Can A Bad Belt Cause Rough Idle
Possible Reasons Why the Car Is Idling Rough. But keep in mind, the idle speed should be set in stone - if it is inconsistent or changes at random intervals, you may have a bigger issue on your hands. Timing Belt/Chain. After the rough idle it is perfectly fine like nothing happened and there is no more white smoke. Like really bad shaking. A good tune up also sounds neccesary. 5 ltr but it does happen. 8L engine that has an extremely rough idle. Few reminders before starting:-Check the power steering hose and reservoir, make there are no ATF leaks that get to the serpentine belt and air compressor. Had issues with battery not starting. The guy who did my belt said that each cam was a tooth out. 2002 Jetta 1. My question is, can faulty water pumps cause a rough idle? When I start my car it is HELLA loud until I put it in drive it quiets down a bit but I can still hear the gridning noise faintly. I bought it from my sister roughly 2. After the engine has been running for about 5 min or so (RPM's roughly 600 to 800)and I come to a stop light/sign it will start idleing rough but will. This component supports the engine in its compartment and absorbs the engine vibrations and road shocks. There is no adjustment that can be done to the IAC on an '03 so that shouldn't be. When you have checked all the possible causes listed and you are still experiencing the problem, see your John Deere dealer. to check and see if any accessories have a wobble or rattle or w/e you can take the belt off of the car and run it. it idles rough enough to shanke the entire truck. Can this be checked with a timing light without having to pull the belt covers? I checked the timing at the crank with a lightSpec is 20 degress BTDC at correct idle rpm of 600-800rpm. 6l and about 6 months ago i could notice it had a rough idle, i left it for abit but when i had the cash i took it in to my local mechanic, they told me "they couldnt find the problem" and said they checked my codes and reset them (for $30. This can upset the rotation of the belt and lead. at idle the car is extreamly rough, you can tell that it is fighting to stay alive. When hot, the engine is good, keeps it nice around 750 rpm. Bad motor! (a cam belt slipped) or clogged and melted CAT, bad compression, vacuum low and fluctuation (bouncing) madly) Bad head valves. They can cause bogging at idle, varied R. Diagnose and Fix Rough Car Idle - Main Causes For Shaking / Vibrating While at a Stop - Duration: 12:35. Slipping or squealing drive belts, belt damage or accelerated belt wear. 122k miles. The old mounts have 95k miles on. There are two distinctively different types of belt noise, "Chirp" and "Squeal". This afternoon I can report back with the spark plugs I used but I'm pretty they're fine. Belt Stretch by: Jim Zeiser I replaced my Chinese OEM belt with a Gates aramid fiber belt. Well today it started running very bad, so I stopped at the gas station to add some dry gas and fuel up, which I did. A misfire usually starts out as being merely a nuisance but if the causes aren't identified and corrected, it may result in your engine not starting or stopping altogether when you least expect it. ( idle RPM will be way too low ) Coolant never warms up to 180F and holds, the Thermostat is bad, wrong, installed wrong, or missing. If the cause of the rough idle is an engine misfire, a mechanic may start by replacing the spark plugs or fixing a vacuum leak. Replaced timing belt, water pump, tensioner, idler pully (checked timing as well, is dead on) Replaced throttle body, no change. No CEL's present, never had one. With the engine warm and in gear (and the van firmly secured from moving), disconnect each coil. On the freeway at speeds over about 80 the check engine light would flash only. I had to rev the engine just to keep it running and the motor sounded flat. Lets start with the cheapest. First, however, they must determine the precise cause. In more serious cases, the bearing, or pulley itself may wear out to the point of breaking or cracking, and coming apart, or seizing. If the vacuum system gets a leak, it will cause a shake when idle. In addition to causing the check engine light to turn on, vacuum leaks can lead to problems with acceleration. The error code could help us diagnose it a bit better. When chunk-out has occurred, a belt can fail at any moment. It can be caused by: Worn serpentine belt (a frayed belt is about to fail completely) Worn pulley causing the belt to slip; Pulleys are loose and need to be tightened; A quick stop to the mechanic should easily clarify the cause of the problem. Bad spark plugs, bad spark plug wires and a bad distributor cap are other common causes of rough idling. However put it in park and she purrs. Coolant leaks around the water pump would indicate a bad seal and shaft bearings in the pump. End result: Rough idle after breaking due to auto transmission not downshifting gone. Replaced timing belt and water pump, pullies and tensioner were good. Read more below to find out what the problem could be. it idles rough enough to shanke the entire truck. The alternator pulley is one of several devices driven by the serpentine belt (driven by the engine crankshaft), which also may include the AC compressor, the power steering pump, and the water pump. Do not attempt to replace a worn pulley in a used tensioner assembly but always replace the entire tensioner. This is because the exhaust gas does not re-circulate to the engine at idle, and it only happens when the motor exceeds the 30mph. Dealing with high engine idle issues can be quite frustrating until you identify the cause of the problem. Re: 1991 Rough Idle/Misfire Bring the bill to the Acura dealer and ask them to pay for the service. Cleaning out the carburetor to remove carbon deposits is probably a good place to start. Ford F-150 (2004-2008) :: 2005 5. bad fuel, wiring faults, and worn or fouled spark plugs, loose alternator belt or faulty alternator. The cams need to be lined up at their respective marks also, if this was done then look for loose connections, bad plugs, clogged pcv, or possible damage to the engine when the other belt broke. A common source of misfire codes is use of non-factory fan belts. Resist the urge to adjust the TB set screw for low idle concerns. There is no adjustment that can be done to the IAC on an '03 so that shouldn't be. Lets start with the cheapest. That would cause your bottom bog. Timing Belt A timing belt jumping a tooth is also a cause of rough idling. But currently its not throwing any codes and doesnt seem like there are any glaring issues, so all I can do is wait and see if the rough idle continues or I eventually throw a code. It runs better cold. ON the bugeye 2. Then you should check all the vacuum hoses — a leaking hose can cause a too-lean mixture and a rough idle. I have a 2000 Accord with a 2. I'd recommend having them go back in and recheck the timing marks or have another shop check the timing. Damaged bearing or pulley. If vacuum is low, check condition and location of all vacuum hoses. Actually, if you don't. I dont see it as much on the 2. I am having a rough idle issue with a 1995 Tacoma 2. I had noticed occasional rough idle prior to taking it in but ignored it, hoping it was a nothing serious. Answers and questions: nissan frontier rough idle NISSAN Rough Idle Anyone else with a rough idle When my truck is warm and idling at a light the rpms dip slightly and the idle becomes rough enough to feel vibration in the steering wheel and cause a droning low freq type sound in the cab. This was also accompanied by the Malfunction Indicator Lamp (MIL) or Check Engine light code of 43. However, if the engine is running rough and then throwing the code, it is typically not the fan belt(s). If your timing belt is not properly tensioned it will not keep the valves timed properly to the lower end and this will cause misfires, loss of power, bucking, and could even cause a no start condition. If the tachometer is rock steady, and the shaking seems worse in gear than out of gear, that's a pretty good indication of a bad motor mount. There is that hicup where the engine sounds like it stalls for half a second and then the engine idle is rough. The error code could help us diagnose it a bit better. If the 'Check Engine' indicator on your vehicle glows continuously, a possible cause may be a malfunction in the idle air control valve. Slipping or squealing drive belts, belt damage or accelerated belt wear. A bad EGR valve can cause a lot of headaches, poor running, bad idle, stalling, etc. Possible Reasons Why the Car Is Idling Rough. My Silverado was breaking AC belts. A long list of systems, components and electronics can cause a rough idle. Sure, an O2 sensor can cause a rough idle and maybe you're right, but more information is needed to accurately diagnose this than a simple description of 'rough idle when warm', otherwise its just speculation. Damaged bearing or pulley. This can help your mechanic identify the problem. 2005 Trucks, Crank/No Start, Hard Start, Runs Runs Rough at Idle: Pickups and vans built before 4-15-05 and Excursions built between 1-10 and 4-15-05 may exhibit hard or no start conditions with a low ICP signal, or a rough idle with a high ICP signal. Below are the top causes that a mechanic would look for. Back to the rough idle after all has been checked and confirmed good you still have the other parts of the emission system to check. Noise seems loudest at the rear of the car; I can hardly hear it inside with the windows closed. The issue will eventually worsen as the pulley continues to wear. 15) Check all Vacuum lines. The reason I keep mentioning the MAF is because dirty/failed MAFs are notorious for causing intermittent poor idle, lrough-running, ow-power, high fuel usage, etc. If the AC works fine out on the open road and does the slugging when going slow or idleing. Here's how I fixed the problem. The engine seems to pull fine above 1400 rpm and is smooth to redline but it idles very rough and somewhat. ) The EGR Valve is sticking open. typical causes sparkplugs/wires/coils dirty throttle body idle air control valve bad timing sparkplugs/wires/coils damaged, old, sparkplug wires can easily cause misfiring that in turn will give you a rough id. Re: 1991 Rough Idle/Misfire Bring the bill to the Acura dealer and ask them to pay for the service. Entrapped air can cause “bubbles” that can implode under pressure causing pump. The service life for new O2 sensors is approximately 100k miles, but check and replace ahead of time if necessary. So I work for a mechanic company, and had one of the mechanics listen to my vehicle. Slow down and the CEL stopped. This is a general engine misfire. In some instances a bad pulley may bind or slip and cause the belt to squeal when the engine is first started. They can cause bogging at idle, varied R. 1) Engine Misfire. This is because the exhaust gas does not re-circulate to the engine at idle, and it only happens when the motor exceeds the 30mph. However, if you know what some of the most frequent caused of engine vibration are, you can not only avoid too much stress and worry, you can know how to explain the problem and symptoms to a car mechanic when the time comes to correct the problem. Belt-driven accessories fail. Doesn't run bad on it, just not great. 5 194,000 miles. The model is Mazda protege 2002, 2. Since the weather got warmer this week, my wife has been using the AC and noticed a rough idle now all of the sudden. Two bolts and the belt tensioner was all that needed to be removed. The PCV valve on the 540 can cause some problems, but I'm not. For the do-it-yourself mechanic, Many high-idle problems can be identified and remedied with some patient troubleshooting. what is it that causes rough idle , when you are stopped in a red light, then ehn you try to star the engine dies, Report; if so,it just might be an Engine mount or bad belts and in need of a Tune up such as new points,plug & filter Also wiring is an issue much of the time in these K carstake out the plugs,filter and points if. Ok, need a little help. Should I be worried? Is it likely to get any worse? Ta. Around mid January 2003, my problems began with the symptom of "a constant rough idle" with the transmission both in drive and neutral/park. ? All explain are approximative value. Heat, age and stress are the primary contributors. If you're getting the rough idle at cold temp I would look at the intake manifold gaskets. This also goes along with the fact that it ran fine before the timing belt was replaced. What could cause this rough idle scenario, is the compressor going bad? Or belt? Thank you in advance. Car power steering developed fast After WWII. The issue will eventually worsen as the pulley continues to wear. Hard to get into gear while running. Anyways, I went and replaced the timing belt, water pump and oil pump. Back in the summer of 2011, the idling had gotten so bad that my car would stall in traffic, at stop signs, stop lights, drive thru. You may hear the engine. Vacuum leaks is considered the primary cause of engine idle. The RPM surges up and down to close to 1-1. But currently its not throwing any codes and doesnt seem like there are any glaring issues, so all I can do is wait and see if the rough idle continues or I eventually throw a code. The alternator pulley is one of several devices driven by the serpentine belt (driven by the engine crankshaft), which also may include the AC compressor, the power steering pump, and the water pump. I would do that for now. If it were to not switch correctly it could cause reduced throttle response in certain speed ranges, but the only way it could cause lean misfires is if it was the source of a vacuum leak, in the same way any gasket, seal or cracked plastic part can cause a vacuum leak. Will a bad tensioner adjuster create enough slack in the timing belt to cause a rough idle? I recently bought a '98 Outback with 135k miles. After picking the car up I drove to the post office (~ 1 mile away) and noticed while sitting at a red light it seemed a little rougher. so yes, if the sensor is bad it could possibly be telling the computer that the car is cold, causing it to run rich, which "once at operating temp" would cause it to have a rough idle. ON the bugeye 2. 1) Changing distributor fixed the original rough idle/misfire problems. At least not if you are describing things accurately. It seems to drive ok and no check lights but stopping at a light it has more vibration and noise than it used to. Loose alternator belts also cause automotive components to work harder in order to compensate for voltage fluctuations. High fuel pressures can overcome an obstructed filter, but as soon as you slow down, the smooth operation goes away, replaced by some of the symptoms listed here. A serpentine belt is the most common belt in today’s cars—it controls the functionality of most every system for your car. Well I replaced it and still have the squeal. There are several common causes of engine vibration in a car, and they all result in shaking and noises that can be quite alarming and sometimes scary. The serp belt is textured on the back. Timing Belt. I doubt if it will have much affect on how your car runs unless it is a very modern engine. If vacuum is low, check condition and location of all vacuum hoses. my front passenger engine mount is bad in my 99 eclipse, and when I let it Idle and look at the engine, I can see the engine rock back and fourth, it is also idling rough, jumping back and fourth 50 rpm or so, and everything the rpms jump, the engine moves, is the bad mount related? it's got new plugs and wire and a new ignition coil. I replaced the IAC, no change. After the engine has been running for about 5 min or so (RPM's roughly 600 to 800)and I come to a stop light/sign it will start idleing rough but will. BUT I and others can not stress enough, check the valve adjustment right away. idrivea2005sierra wrote:My exhaust note hasn't changed at all with the rough idle. -my first Subaru- The #3 exhaust valve burned out. Used to be smooth in park, neutral, and reverse, but it shakes in even those now. The only code I got was 42, FTS, which is not likely the cause of the problem. There are several common causes of engine vibration in a car, and they all result in shaking and noises that can be quite alarming and sometimes scary. As for an exhaust restriction you can check for this by removing the O2 sensor and taking it for a drive, if the performance issue goes away or changes you may. We've driven it a bit since then, and the idle still seems rough a lot of the time, and I can't tell if I'm feeling more vibration than before when driving or in park/neutral. You're right to assume that something else going on. Here's a great video on how to diagnose bad plug wires with a multimeter. Still has rough idle intermittently, but not very often. Cold temperatures in the winter can also cause a rough idle in the Subaru Legacy. This has always been a little rough for as long as I have owned it (bought it in '98) but not quite this. You may hear the engine. Poor alignment can also cause premature wear, belt mistracking or rib skipping, and belt edge wear and fraying. It seems to start after it is warmed up. - Van initially idled ~4000 RPM's after timing belt work, now settled about 1500 to 2000 - Idle is high but smooth; no surging or loping - The power steering pressure switch, while in need of repair, is not the cause - Manually pushing the throttle closed lowers the engine speed and holds it lower after releasing. The rpms were very low, 400-500. End result: Rough idle after breaking due to auto transmission not downshifting gone. alright, i was just reading a post about a rough idle. Getting to know the causes will help you explain better to the mechanic, and it will make it easier for him to sort out the whole problem. I will wait to see if it happens again prior to getting the flash. I just feel it shaking from the driver's seat. I now get a bad engine vibration at idle and when backing up and pulling forward. Did a compression test and the front bank is ~210, Rear ~185. One of the few things that it can't cause is overheating. Entrapped air can cause “bubbles” that can implode under pressure causing pump. Subject: rough idle IP: Logged Message: I have read some of the posts on this before , but can't seem to find the cause for me. If the timing belt or chain has jumped a tooth, the camshaft(s) and crank will no longer be lined up properly. Your car’s timing belt, serpentine belt, or v-belts on other systems, are common causes of engine vibration and squealing. Haven't used them since. Lower octane gasoline can cause engine knocking. The check engine and BAS light are on. And you can't miss when it changes. Engine Misfires; Perhaps the single most common cause of rough idle comes in the form of a misfiring engine. You can't set the timing until the idle speed is correct and the idle won't be stable until your misfire is fixed. Bad spark plugs, bad spark plug wires and a bad distributor cap are other common causes of rough idling. 3s rough idle. But after installing the part, things didn't improve. Another symptom of bad or failing drive belt tensioner is. Complaint #4 – MY CAR IDLES ROUGH Rough idle is most commonly caused by a tune-up problem or vacuum leak due to deteriorated vacuum lines. Hi I had a check engine Light stay on and a low rpm idle 150, rough Idle it what felt like a rough idle was bad motor mounts, and the light ended up being a nuchals vacuum leak detections Valve it is mounted by the gas tank on a dodge grand caravan 3. The alternator pulley is one of several devices driven by the serpentine belt (driven by the engine crankshaft), which also may include the AC compressor, the power steering pump, and the water pump. Still have rough idle and #1 cylinder misfire code. It can be so bad it can stall the car or cause the revs to hang at a bad moment for that. Blackbear guys were very helpful in analyzing the logs with me for the rough idle. Bad timing can also cause pinging. Re: Rough Idle/Engine sputter 2000 sl2 dohc T-stats are generally a two-bolt affair and yours is just below the a/c compressor. At high speeds it runs fine. We first looked at MAF, which I already changed and then vacuum leaksmy friend wanted to replace the idle air control, but we. There are several common causes of engine vibration in a car, and they all result in shaking and noises that can be quite alarming and sometimes scary. The issue will eventually worsen as the pulley continues to wear. The truck went from running fine to barely idling and 40mph tops. i lost #6 cylinder compression recently on my procharged 98 and it idles the same way and shakes like a paint mixer. I first noticed the rough idle after coming off the interstate and coming to a stop and it would usually clear itself up after shutting the engine off. 0 engine this was very common. Got it back in the car and it fired right up. And he said it was probably the water pump when listening. This will. About two weeks ago, I started to notice the engine stumbling a bit when I'd come to a stop. Once these parts have been replaced or ruled out, the sensors that could be at fault include: Coolant Temperature Sensor, Manifold Absolute Pressure Sensor, Air Charge Temperature Sensor, or Idle Speed. Battery dies. There are many possibilities with EFI (bad wiring, bad connections, faulty sensors, fuel pressure, ECM, etc). Just wondering if anyone has thoughts on possible. We wrote about something similar on the Prius, being a common cause of the MIL. I bought this as a Certified Pre-Owned Cadillac in October of last year with 32,625 miles on it. Timing is correct. A high pitched noise from the timing belt usually means the belt is too tight. That would cause your bottom bog. Restricted egr passages will not cause a rough idle because egr is not commanded to flow at idle. Replaced timing belt, water pump, tensioner, idler pully (checked timing as well, is dead on) Replaced throttle body, no change. If the belt you put in was better quality than the one that came out it will take awhile for the new belt to stretch and ride out further on your variator. I have an 2003 TJ, the 2. In addition, pull each coil and connect it to a grounded, mule. Damaged bearing or pulley. 0L throttle body, but kept the 2. Use fuel stabilizer to keep the gasoline fresh. Diagnose and Fix Rough Car Idle - Main Causes For Shaking / Vibrating While at a Stop - Duration: 12:35. The truck went from running fine to barely idling and 40mph tops. The error code could help us diagnose it a bit better. I did get a little squeeling from what I assume was the alternator belt, that familiar sound we all know. Several possible reasons cause the engine to sputter and run rough hat may result in engine misfiring but the most common are: What causes a car to sputter and idle rough 1) Bad valve 2) Bad coil or spark plug wires check the timing belt. It ran good before, but now runs bad really bad. Replaced timing belt, water pump, tensioner, idler pully (checked timing as well, is dead on) Replaced throttle body, no change. The idle is very rough and makes my car shake. After driving around then stopping for a short period of time then starting it back up and driving, it had a rough idle in park and when stopped. In addition, cracked, brittle, torn belt, contaminated belt due to oil or power steering fluid can contribute to decreasing power. This component supports the engine in its compartment and absorbs the engine vibrations and road shocks. A long list of systems, components and electronics can cause a rough idle. The alternator pulley is one of several devices driven by the serpentine belt (driven by the engine crankshaft), which also may include the AC compressor, the power steering pump, and the water pump. 7L Rough Idle IP: Logged Message: I reset the PCM last night. 9 m42 motor. That will be the last time that I don't change the timing belt and inspect water pump when scheduled. We wrote about something similar on the Prius, being a common cause of the MIL. It can be caused by: Worn serpentine belt (a frayed belt is about to fail completely) Worn pulley causing the belt to slip; Pulleys are loose and need to be tightened; A quick stop to the mechanic should easily clarify the cause of the problem. Alternately, your ride may feature a series of V-belts (also known as a fan belts), which perform the same all-purpose functions as a serpentine belt. I have not tried this myself. This is one of those things I had put away into the "ah-ha" files so long ago and, for whatever reason, decided to look a little deeper tonight since I was already there. Read more below to find out what the problem could be. If the timing belt or chain has jumped a tooth, the camshaft(s) and crank will no longer be lined up properly. Plugs are supposed to be changed every 20k miles. (if you didnt have one not sure it suppose to be rough lol) When is not on you have a rough one but really little (tuned or not) when you load the engine with the ac is more worst. Car shakes when idle can also because of this car part This one along with other belt types such as V-belts and serpentine belts could create this annoying problem. I loved the car; until about 1 year after purchasing. The belt tensioner spring or "idler" pulley going bad could give you issues like this. 3L 4 cylinder and manual transmission. 9L idles rough. My 92 calls for. Whether your lawnmower is a shiny new model that's your pride and joy, or an old faithful model that you've had for years, you want it to work correctly when it's time. Well today it started running very bad, so I stopped at the gas station to add some dry gas and fuel up, which I did. Slow down and the CEL stopped. Bad mounts aren't going to lead to a fluctuating idle or grinding noise. If you have any strange idle problems, it's always a good idea to check the. The issue will eventually worsen as the pulley continues to wear. My 2010 Fusion 3. Hello everyone. No the throttle stop should NOT have been messed with. 122k miles. Re: Could bad alternator or belt cause rough idle or pinging Three item rule of thumb: gas/air/spark Check/replace your fuel filter and air cleaner. Unfortunately this morning when I started the car it ran very rough then stalled, I tried restarting and the same thing happened. Sight down the side of the belt to make sure the edge does not make any bends toward or away from the engine. However, if you know what some of the most frequent caused of engine vibration are, you can not only avoid too much stress and worry, you can know how to explain the problem and symptoms to a car mechanic when the time comes to correct the problem. Check carburetor base gasket and manifold gasket. This component supports the engine in its compartment and absorbs the engine vibrations and road shocks. But this particular problem is with a computer trouble code P0300. A Bad EGR, the EGR is leaking and causes horrible idle speed misfire/stalling and flooding or spark plug fouling. If your timing belt is not properly tensioned it will not keep the valves timed properly to the lower end and this will cause misfires, loss of power, bucking, and could even cause a no start condition. Car power steering developed fast After WWII. If you are experiencing a rough idle or your RPM is running high when idling, then there are a variety of reasons for why this could be happening. Since a bad timing belt can put a damper on the firing rate of the engine, it will likely cause the engine to misfire. it idles rough enough to shanke the entire truck. Of course I only found it by swapping the MAF with my other Volvo with an identical MAF part. I just changed the timing belt, balancer belt, water pump, tensioner wheels and other external belts. I have a 1998 Volvo S70 GLT with 185K miles on it. At slow speed or idle, heat causes the pressure to rise too much in the AC gas which tries to make the compressor lockup. That makes diagnosing the root cause challenge, especially if you aren't sure where. Replaced timing belt and water pump, pullies and tensioner were good. Worn engine parts such as valves, rings, or camshaft will cause a rough idle. If the rough idle continues, proceed to Step 3. A worn one will get a "flat spot" causing erratic, inconsistent idle, power loss, and poor fuel economy. These should be investigated, diagnosed, and repaired as soon as possible. The RPM surges up and down to close to 1-1. The issue here is you also claim the RPM drops when you raise the windows, turn the headlights on or turn the AC on, this sounds light something other. The EGR valve works by routing a small amount of exhaust back into the combustion chamber. Too much air in the system will also trigger a "lean" code in the engine, but may do so in complete absence of any other. 5k - 2k RPM. Fortunately, a mechanic can often alleviate rough idling without much trouble. A common concern DIY Toyota and Lexus owners call CARspec for is a rough idle, starting and dying, or a hard start just after replacing or disconnecting the 12 volt starting battery. Hey whats up guys, i've been having a problem with a rough idle its been going on for a while and i just cant seem to get it properly diagnosed. I reset the timing to 10, and the idle got worse. Could also be IAC vavle malfunctioning. It seems to drive ok and no check lights but stopping at a light it has more vibration and noise than it used to. It happened a few times, and was pretty subtle and didn't last long. Repair or replace bad spark plugs, ignition coils, or plug boots; Repair or replace shorted or open circuits or connectors; Make sure there's good amount of fuel in the tank; Replace ECT sensor. For the engine, the drive by wire throttle body does the work of an idle air control too. I love that car. 1) Engine Misfire. At 146,000 my 1994. And keep in mind that the most rough idles issues come from lack of proper maintenance. **** Rough Idle in Gear. A faulty alternator can fast idle issues; if so, replace it. Check and adjust the valve lash on the engine if you find low cylinder compression. Either of these conditions can lower the engine's efficiency and cause the "Check Engine" light to glow. Should I be worried? Is it likely to get any worse? Ta. 7L Rough Idle IP: Logged Message: I reset the PCM last night. I have a 2003 4WD with the 3. Loose alternator belts also cause automotive components to work harder in order to compensate for voltage fluctuations. Well today it started running very bad, so I stopped at the gas station to add some dry gas and fuel up, which I did. if its the 377 you might have to change clickers on primary to get your top rpms to aroun 8000-8150. 50's and some cutout flares. Adjusting the idle speed on the carburetor and cleaning the fuel intake system can rectify this issue. Also ingesting water can cause this. I checked the timing and it was 18 degrees. For argument's sake, I'll assume you have a 1. The 429 has a one piece hub and balancer combo pressed onto the crank shaft. If the tachometer is rock steady, and the shaking seems worse in gear than out of gear, that’s a pretty good indication of a bad motor mount. I have a 05 fx4 5. You can throw parts at it to see what sticks or do the correct thing and have the electronics electronically tested. I first noticed the rough idle after coming off the interstate and coming to a stop and it would usually clear itself up after shutting the engine off. Bad fuel causes a rough-running engine. An EGR valve. Damaged bearing or pulley. Getting to know the causes will help you explain better to the mechanic, and it will make it easier for him to sort out the whole problem. The issue will eventually worsen as the pulley continues to wear. There would be other noises associated with that most likely such as a high pitch whine coming from the timing belt area. I show you a method in the video that is a sure way to find the. The engine seems to pull fine above 1400 rpm and is smooth to redline but it idles very rough and somewhat. Too much air in the system will also trigger a "lean" code in the engine, but may do so in complete absence of any other. If he meant a bad idler pulley and not IAC then you've just purchased the wrong thing and will want to return the IAC. Damaged Motor Mounts Any damage to the motor mounts can cause the engine to vibrate and shake during idle or when stopped. The reason I keep mentioning the MAF is because dirty/failed MAFs are notorious for causing intermittent poor idle, lrough-running, ow-power, high fuel usage, etc. Also, when your timing belt is loose, it will cause some drivability issues usually under high load or high rpm. Diagnose and Fix Rough Car Idle - Main Causes For Shaking / Vibrating While at a Stop - Duration: 12:35. We've driven it a bit since then, and the idle still seems rough a lot of the time, and I can't tell if I'm feeling more vibration than before when driving or in park/neutral. A bad idle-speed control unit can cause the problem; it may need to be replaced. Almost feels like a slight misfire. I have checked cleaned and rechecked everything and still the car has a rough idle and when accelerating out of 1st gear and every gear after the motor cutss out boggs down and has ZERO power but car doesnt stall when i take foot off pedal power comes back. People always seem to complain of bad idle after a cambelt change on here. Ultimately, everything from the ignition and fuel injection systems, to valves and pistons can cause a rough engine idle. A plugged PCV hose or blocked ports in the breather chambers can cause rough idle,stalling,slow idle speed as well as oil leaks and sludge in the engine. Over time, the throttle body and Mass Airflow Sensor (MAF) can become fouled with dirt and oil, thus contributing to rough idle. But this particular problem is with a computer trouble code P0300. Is this a serpentine belt issue? Or the bearing of some engine accessory? I have 50,000 miles, and have already changed the serpentine belt once, around 4-5 years ago, just due to age of the car. I just replaced the timing belt and water pump because it was leaking,along with the valve cover gasket and spark plugs and pcv valve,I go to start. I replaced the IAC, no change. If the cause of the rough idle is an engine misfire, a mechanic may start by replacing the spark plugs or fixing a vacuum leak. Read more below to find out what the problem could be. A timing belt jumping a tooth is also a cause of rough idling. This may be due to a damaged high pressure oil pump and/or IPR valve. At 146,000 my 1994. Check and adjust the valve lash on the engine if you find low cylinder compression. thanks mate!). The rpms were very low, 400-500. I also hoped a new timing belt would fix it. Ok, the squeaking and rough idle can be one and the same, could also be two different things. The EGR valve works by routing a small amount of exhaust back into the combustion chamber. I had a rough idle for a couple of weeks and then my 3. A bad balanced won't cause an actual misfire. We will discuss some of these causes so that you can easily determine why your car is rough when idling. The serpentine belt is a critical part of this system, and once the engine is running, it continues to operate. Car Shakes When Stopped Or at Idle - Common Causes In Engine by Magnus Sellén 5 June, 2019 2 Comments It is perfectly normal for your car engine to slightly vibrate when in use due to the rotation and movement of essential engine components such as the gears and timing belts. The serp belt is textured on the back. Spark plugs provide the spark that ignites the air and fuel mixture within the cylinders. A damaged belt will obstruct the rotation of fans and other components connected to it. A bad hose in any part of the engine is easy to fix. Here is what happened: I was having no idle/stalling problems prior to this. Damaged Motor Mounts Any damage to the motor mounts can cause the engine to vibrate and shake during idle or when stopped. Most auto service centers can do this for you if you need technical expertise. Also when I. Engine Misfires; Perhaps the single most common cause of rough idle comes in the form of a misfiring engine. I installed a billet timing tensioner and new timing belt tonight. If the engine idle was lower after the timing belt replacement, I would look there first. Drain the fuel tank and fill it with fresh gasoline if the fuel is over 6 months old. And be warned that on interference engines, a broken belt or chain can cause severe engine damage as well. Timing Belt/Chain. alright, i was just reading a post about a rough idle. There is that hicup where the engine sounds like it stalls for half a second and then the engine idle is rough. Bad timing can also cause pinging. If the timing is off between the cams then it will cause a rough idle but will run fine while driving just like you are having. Page 1 of 3 - Rough idle/ Engine judder at idle? - posted in MkV (Mk5) Golf, Golf Plus & Jetta: Ive just bought a 58 plate 140 Tdi GT Sport, with 35k on the clock and have noticed I get the rought idle problem. Personally if I can figure out where that bad boy is, I'd like to reseat it first see if its jsut a bad connection, before I drop 70 bucks on a new one. Worn engine parts such as valves, rings, or camshaft will cause a rough idle. But if there is one thing that crops up time and time again it is a poor idle. 14) Throttle Body - Clean it out and replace the gasket (can use gasket material cut to size). I loved the car; until about 1 year after purchasing. Possible Reasons Why the Car Is Idling Rough. Ok, the squeaking and rough idle can be one and the same, could also be two different things. Few reminders before starting:-Check the power steering hose and reservoir, make there are no ATF leaks that get to the serpentine belt and air compressor. No the throttle stop should NOT have been messed with. However, if you know what some of the most frequent caused of engine vibration are, you can not only avoid too much stress and worry, you can know how to explain the problem and symptoms to a car mechanic when the time comes to correct the problem. No it is not your serpentine belt. 5k - 2k RPM. Appearance: With the engine off and the belt removed, manually rotate the pulley. 9L idles rough. There are things that can cause excess vibrations that will prematurely kill your mounts, so the mounts could be a symptom, not a cause. Now keep in mind I didn't remove the belt, but the left side is smooth on the back and the right side is textured on the back. Poor alignment is the number one cause of belt noise. At high speeds it runs fine. if its the 377 you might have to change clickers on primary to get your top rpms to aroun 8000-8150. If you have a bad oil leak on the front of your engine, it's possible that your timing belt jumped a tooth. Greg Biggs My 2005 Buick LaCrosse runs smooth. ) The IAC or Idle Air Control Valve has built up some carbon on the place where it seals. I started by dismantling the throttle body and cleaned it up. What results is rough idling and engine misfiring. Bought a new one for $12. In September of 2011 it began to have the condition where it would sputter or stutter under acceleration and even. my front passenger engine mount is bad in my 99 eclipse, and when I let it Idle and look at the engine, I can see the engine rock back and fourth, it is also idling rough, jumping back and fourth 50 rpm or so, and everything the rpms jump, the engine moves, is the bad mount related? it's got new plugs and wire and a new ignition coil. Most auto service centers can do this for you if you need technical expertise. My question is, can faulty water pumps cause a rough idle? When I start my car it is HELLA loud until I put it in drive it quiets down a bit but I can still hear the gridning noise faintly. GMC Envoy 2003 Engine Shake and Rough Idle. Incidentally, the mechanics at JL Motorworks are experts at quickly diagnosing the root cause of your rough idle. It runs very rough at idel and at take off it kinda shutters at first untill it gets going. Obviously, batteries sometimes fail on their own--but a bad. The RPM surges up and down to close to 1-1. 0L throttle body, but kept the 2. Now as of recently my car has had a rough idle, but it has also, since i can remember had a loose/rattling belt tensioner. Should I be worried? Is it likely to get any worse? Ta. Your Jetta's engine creates vacuum when running. If any pulley wobbles, feels loose or feels rough or binds when it is spun by hand, it could also be a source of noise and should also be replaced. That solved it. The old mounts have 95k miles on. A bad fuel injector will either deliver more fuel or less fuel to the engine, or fails to operate at the right time. If the rough idle continues, proceed to Step 2. Ok, the squeaking and rough idle can be one and the same, could also be two different things. 80% of the time people jump to opti's. Lets start with the cheapest. Noisy Drive Belts. it is not tight enough, or worn it is not able to run as smoothly as needed to keep the engine running smooth. And be warned that on interference engines, a broken belt or chain can cause severe engine damage as well. This can upset the rotation of the belt and lead. They had done a lot of work on it, timing belt and service for a burnt valve due to it running. 5k - 2k RPM. The motor ran at 850-900 in neutral at first but after running it for awhile it would still miss and die when coming back to idle like coming to the dock. I had a bad MAF that would cause the car to idle super rough without throwing a code. You can try disconnecting the MAF and if the idle smooths out, then that's a good indicator that you have a bad MAF. After it was replaced, I noticed the car was shaking in idle and on gear, very little on gear 1. Put the replacement alternator on, and tighten the belt tensioner. The throttle body butterfly valve is designed to allow only a very small (if any) air to pass. In some instances a bad pulley may bind or slip and cause the belt to squeal when the engine is first started. I have this idle problem too. Replaced timing belt, water pump, tensioner, idler pully (checked timing as well, is dead on) Replaced throttle body, no change. So far it has been suburb. It is weird that it does it only when idle. 3s rough idle. He said to bring it back if it doesn't, but he didn't check the timing belt when we brought it back in because it would have triggered a light if it was off. I just replaced the timing belt and water pump because it was leaking,along with the valve cover gasket and spark plugs and pcv valve,I go to start. This has always been a little rough for as long as I have owned it (bought it in '98) but not quite this. My IAC went bad last year and the car wouldnt idle at all. but if I keep the car above 1k rpm it idles fine (IE: running the AC) Any help with this would be helpful. Too much air in the system will also trigger a "lean" code in the engine, but may do so in complete absence of any other. Solving Honda Idle Issues, Rough Idle I get a TON of questions about Honda idle problems so I’ve put together this article to help you should you run into a rough idle on your Honda. Rough Idle '86 300SDL He says they can fall to one side and cause that sort of problem. 7l with 130k started running rough when just idling. 0L throttle body, but kept the 2. A serpentine belt tensioner is designed to keep the belt tight during the engine operation and also take up the slack as the belt naturally wears. Moreover, sometime you will lose power altogether if the drive belt snaps in half. Just wondering if anyone has thoughts on possible. One of the few things that it can't cause is overheating. Bad alternator causing rough idle? Posted by 95GrandPrixGTP, Jul 7, 2005. This will cause a rough idle and possible misfire code. ( it has passage ways that allow for idle when the throttle is closed, if those passage ways are dirty it can affect the idle, car might idle too low and even stalls) or it could be just the engine mounts are bad and you are mistaking the extra vibration as a rough idle. replaced thermostat gasket. Something as simple as a slipped timing belt can cause it. But I'm back to the problem of just not knowing where it is. The lower fuel pressures at lower speeds cannot push enough fuel through the dirty filter. My question is, can faulty water pumps cause a rough idle? When I start my car it is HELLA loud until I put it in drive it quiets down a bit but I can still hear the gridning noise faintly. If still a problem, check for any vacuum leaks (air), if not, then check/change your plug wires, and changing the cap and rotor is a good idea too -- it's cheap enough. A high pitched noise from the timing belt usually means the belt is too tight. Call to schedule an appointment today! As with many car issues, the root cause of a rough idle can either be a quick, easy, inexpensive fix, or it can be something more serious and costly. Welcome to the Club4G Forums where you can join fellow owners from all over North America discussing anything related to the 2006+ Mitsubishi Eclipse. A bad balanced won't cause an actual misfire. A bad EGR valve can cause a lot of headaches, poor running, bad idle, stalling, etc. A lot more sensors on the car though. I just replaced the timing belt and water pump because it was leaking,along with the valve cover gasket and spark plugs and pcv valve,I go to start. I have a 1997 328i with 145,000 miles. 2002 Jetta 1. Lets start with the cheapest. HC and CO will be somewhat higher as a cold engine warms up because the fuel system may still be running in open loop. Diagnose and Fix Rough Car Idle - Main Causes For Shaking / Vibrating While at a Stop - Duration: 12:35. But if there is one thing that crops up time and time again it is a poor idle. Slow down and the CEL stopped. Switched to 89 midgrade, and she's a totally different truck. The issue will eventually worsen as the pulley continues to wear. Hi I had a check engine Light stay on and a low rpm idle 150, rough Idle it what felt like a rough idle was bad motor mounts, and the light ended up being a nuchals vacuum leak detections Valve it is mounted by the gas tank on a dodge grand caravan 3. (side note, make sure that the problem isn't with your EGR sensor, and not the valve). It sounded very rough. Another symptom, more visible, symptom of an issue with the idler pulley is a damaged bearing or pulley. The squealing could also be the belt, they get glazed from heat which can cause a loss of friction. Just replaced both pre-cat O2 sensors due to code that has been on since 80,000. Here are a couple of videos to get you started. Re: 1991 Rough Idle/Misfire Bring the bill to the Acura dealer and ask them to pay for the service. If the issue stems from a clogged fuel injector, the mechanic may need to clean or replace the fuel injector, depending on the extent of the damage. They really like to turn the idle rpms down on cars to save fuel but in turn can cause harshness. Sight down the side of the belt to make sure the edge does not make any bends toward or away from the engine. Coolant leaks around the water pump would indicate a bad seal and shaft bearings in the pump. Once these parts have been replaced or ruled out, the sensors that could be at fault include: Coolant Temperature Sensor, Manifold Absolute Pressure Sensor, Air Charge Temperature Sensor, or Idle Speed. Hey guys, I haven't been on in a while but I started having an issue with my truck and new this was the place to ask. If the noise is coming from the tensioner, it is time to replace it. When I slowed down the power was gone. Unfortunately this morning when I started the car it ran very rough then stalled, I tried restarting and the same thing happened. The first thing I would do would be to clean every contact you can find between the alternator and the battery & then all the ground connections from the. This component supports the engine in its compartment and absorbs the engine vibrations and road shocks. When the engine is cold (RPM's around 1,000) theres no idle problem when I come to a stop light/sign. Sometimes it blows out kinda white smoke, smells like it is running rich you can smell gas. Used to be smooth in park, neutral, and reverse, but it shakes in even those now. Just wondering what the cause of a rough idle only when the Outback is in gear and at a stop. There are many possibilities with EFI (bad wiring, bad connections, faulty sensors, fuel pressure, ECM, etc). and they have a lot of useful information on there that can help these problems. Still has rough idle intermittently, but not very often. Now keep in mind I didn't remove the belt, but the left side is smooth on the back and the right side is textured on the back. Could be a vacuum leak form broken rotten hose as this is most common cause of stalling/no idle. Replaced timing belt, water pump, tensioner, idler pully (checked timing as well, is dead on) Replaced throttle body, no change. If it rattles when idle, it can mean something completely different than engine rattle while accelerating. Since a bad timing belt can put a damper on the firing rate of the engine, it will likely cause the engine to misfire. 3L 4 cylinder and manual transmission. 2003 Montero Sport 3. Also my car developed a funky idle in which eventually led to the check engine light coming on. 3l and it's idleing really rough, and during an extended idle, 10mins or so, with a/c running it stalled out. The 429 has a one piece hub and balancer combo pressed onto the crank shaft. Conditions that cause turbulent flow include plumbing restrictions such as pipe-reducers and elbows and any source of atmospheric air such as a leak in an inlet hose or a loose connection. Few reminders before starting:-Check the power steering hose and reservoir, make there are no ATF leaks that get to the serpentine belt and air compressor. These items are all important parts of what keeps a vehicle running. If the rough idle continues, proceed to Step 2. In addition, cracked, brittle, torn belt, contaminated belt due to oil or power steering fluid can contribute to decreasing power. Or your timimg belt. A misfire usually starts out as being merely a nuisance but if the causes aren't identified and corrected, it may result in your engine not starting or stopping altogether when you least expect it. This will cause very rough starts and idles. Re: Rough Idle/Engine sputter 2000 sl2 dohc T-stats are generally a two-bolt affair and yours is just below the a/c compressor. Could be a vacuum leak form broken rotten hose as this is most common cause of stalling/no idle. Timing Belt. I doubt if it will have much affect on how your car runs unless it is a very modern engine. In some instances a bad pulley may bind or slip and cause the belt to squeal when the engine is first started. loose belt tensioner = rough idle? since apparently no one would answer my question in GDT, i decided to make a unmerited thread for such a simple question. I installed a billet timing tensioner and new timing belt tonight. If the belt you put in was better quality than the one that came out it will take awhile for the new belt to stretch and ride out further on your variator. Cold temperatures in the winter can also cause a rough idle in the Subaru Legacy. At my rough idlewhich seems a little too low. Also in this process I gave it a tune up (plug wires and plugs). Causes of Car Vibrations When in Idle Mode. I have checked cleaned and rechecked everything and still the car has a rough idle and when accelerating out of 1st gear and every gear after the motor cutss out boggs down and has ZERO power but car doesnt stall when i take foot off pedal power comes back. At my rough idlewhich seems a little too low. If it has been a while since you changed these components, do so. No code set and a general tune up was done. Ok, the squeaking and rough idle can be one and the same, could also be two different things. That makes diagnosing the root cause a challenge, especially if you aren’t sure where to look. A bad pulley can cause fraying on the edges of the belt, and in severe cases can even cause it to break. If your harmonic balancer is bad, it is easy to replace, because it is a disk bolted to the crank thru the drive pulley. Rough idles can be caused by several things,. Or your timimg belt. At 146,000 my 1994. There is no adjustment that can be done to the IAC on an '03 so that shouldn't be. It ran good before, but now runs bad really bad. If the rough idle continues, proceed to Step 2. Bad accessory pulleys can cause various issues besides noise. Reader Question Good Morning, I have a 1993 Chevrolet C-1500 Work truck (175,000 miles). Re: Rough Idle/Engine sputter 2000 sl2 dohc T-stats are generally a two-bolt affair and yours is just below the a/c compressor. The alternator pulley is one of several devices driven by the serpentine belt (driven by the engine crankshaft), which also may include the AC compressor, the power steering pump, and the water pump. A dirty throttlebody or vacuum leak can also cause the issues you are seeing. Now, there are many, many things that can cause an SES light. Come to think of it, a sloppy belt will cause irregularities in alternator output. It can contact the governor arm and cause a rough idle below 1000 RPM. Alternately, your ride may feature a series of V-belts (also known as a fan belts), which perform the same all-purpose functions as a serpentine belt. Of course I only found it by swapping the MAF with my other Volvo with an identical MAF part. both the mechanic & the service manager said how quiet it was when idling.
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