Car Jerks While Idle

How to Respond When Your Car's Battery Light Goes On. But for the past few days when I'm stopped at a light and its in drive my car will jerk and shake. Due to the vibration the engine will move here. Labels: car bogs, car help, car idle, car idle erratic, car idle issues, car jerks, car problems, Car will not start, erratic idle on engine, idle problem on car 1 comment: David Brown January 27, 2015 at 10:51 PM. - Throttle past 1/4 and it hesitates then jerks. There can be many causes behind this jerking motion, including problems in the starting system, fuel supply, engine or the exhaust pipe. yesterday before getting brakes replaced my car would jerk at a full stop, completely stopped and the car jerks, i had my brakes replaced and it does the same. Worst when i on the aircon. It's just that when I slow down to come to a red light or pull into a parking lot, just letting the idle pull it along, does it do the intermittant lurch-forward action. The only time the car will stop jerking is when I put the gear in "Park". The Top 7 Causes. It is forced to accelerate, or decelerate, otherwise the car jerks and then speeds up when you press the gas and it is in gear, and when you let off it jerks and then slows down. 1999s70 (George) over on Swedespeed posted the following which I hope you will find highly informative and helpful: As one who is on his 5th Electronic Throttle Module (ETM) and 4th Mass Air Flow Sensor (MAF), I’d like to write of my experience with these, in particular noting the symptoms of their impending failure (so that you don’t suddenly find yourself with a stalling car as an 18. What should I do?. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. Also, while driving at lower speeds it ocassionally jerks or sputters. 2000 Pontiac Gr Prix Rough Idle/Dies while driving. 1) Car jerks when I accelerate slowly (Probably 2000rpm to 3000rpm). Opel Corsa B - Engine jerking while driving, irregular idling | HELLA Opel Opel Corsa B Engine code: X12XE (1997 to 2000) Engine jerking while driving, irregular idling. Today while driving to office, I see the jerk at stop light and engine shut down. car jerks when im crusing at low speeds not trans. Usually it is idle at 400rpm without up and down. While driving it seems like I have a dragging feeling on pickup, I shifted into 2nd gear and when I drive in 2nd gear it seems to run just fine, the hardest part is picking up from a stop- which is slow. My 2002 Honda Accord with 82500 miles on it jerks a bit when accelerating. Surging? Car jerks while driving Problems & Solutions RSX most people with IACV issues also report a rough/fluctuating idle along with the jerking at low-medium. currently the idle is 800 rpm in park and 500 rpm in drive. Car is sluggish, jerking, and idles rough Why do some audio amps use AC while. Sorry to bother you all again. Its like the car is trying to jump forward. The causes can vary, but discovering why the shaking is happening is half the battle. I have the following two issues, and I want to get them find a fix before they cause any related damages 1st issue: Driving at a constant/consistant speed, my car jerks as if I were tapping the throttle peddle and then coming off of it. Jerking under load? While coasting? Under light throttle? Car Jerking At Idle. These jerks can be experienced while accelerating or at high or low speeds. Flat, hill, doesn't matter. I let it sit for a minute or so, and it didn't return to normal. The valve needs to be replaced in this case. If this is your first visit, be sure to check out the FAQ by clicking the link above. It is quite irritating when your car shuts off while idling, especially when you are at the traffic signal. If it shakes while it idles, you could be in for a visit to the mechanic. A heat shield noise is a type of rattle you hear while your car is idling, or at a specific engine speed or RPM. A car shaking when driving can often mean something different than a car that vibrates when stopped so you'll want to pay attention to when the shakes are happening. We thought that this was caused by the engine running lean (some cat converter codes noted above). Mercedes Throttle Possition Sensor Problem Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Have been driving like that for 2-3 days now. Car drives great I can hit a hundred miles if needed. can feel the car tremble. PT Cruiser Owner Complaints: PT Cruiser Year 200 6 PT Cruiser Model Standard Found your website the other day in search for the answer to the problem your website talks about. 140000 miles. Letting go of the throttle in any gear jerks the car. It is also a symptom when your car not only jerks but if you see your engine firing something out there while you are driving, then your car’s injectors are definitely messed up. want to set it to about 1100 rpm in park. Automatic Transmission Jerks Before It Shifts. It's difficult to pinpoint the exact reason without the help of an expert mechanic. A malfunctioning throttle position sensor will relay bad data to your car's computer and usually result in poor fuel economy. The car drives nicely, however when I turn the car on the engine SLIGHTLY jerk/shakes a bit, I mean everyone who drove my car noticed it when they first turn the car on, I don't think I'm low on oil or anything like that, I can't. Temps were in the teens on Tuesday morning, and when I started it up, I got the same shaking idle I had back in October, but no CEL. If a car jerks while driving, this is a strong sign of engine trouble. If someone else can plug in a Supercharger to a locked model S, that would invalidate the accuracy of the idle fee charges. The first thing to do if you're confronted by a misfire or rough idle, is to gather as much information as you can to assist your mechanic in diagnosing the problem. The answer to that question depends on the cause of the high idle. 5 liters TBI engines, the throttle body intake fuel rail pressure better be 14. Insufficient burning inside the engine will make the car hesitates or jerks when driving. Express Auto Inspections says: While modern vehicles use a fuel injector system to burn gas, many older cars use a carburetor to process fuel. That is the best way that I can describe it. What could cause a Car to Shake while idle'in? may cause jerking. While driving my car suddenly jerks starts running rough, then stalls when coming to a stop. My car will be driving normally, then sometimes when I start to speed up a little, the engine will rev high (between 4K and 5K RPM) and then jerk into gear. I started the car back and drove for few more yards and I can see jerks while pushing gas pedal. A high idle in your car can cause you to worry. At this point the stress of not knowing when the car is not going to start PERIOD, taking the car in to the shop and renting a car for that period, and then waiting for days until a mechanic calls me and says, "I'm stumped" is leading me to consider breaking up with my Saab. At times the car will stall while going down the road but will start right back up. but when my air con kick in rpm drop to 0. Its normal when theres a mechanical connection between the cold engine and the tires. Difficulty while changing gears. I have just changed all ignition coils and spark plugs. Not missing or anything. My car jerks at various speeds. Your top priority should be the safety of both yourself and other drivers. I drive a 2004 Ford Taurus. It is a potentially serious problem that can make it unsafe to drive your vehicle. Tips on car buying, how to negotiate, and how to buy a car. 6L zeetec automatic with 75000 miles on it. Only issue is running the AC for a while and then parked the car will idle low soon as you turn the AC off the car will. It could be caused by a spark plug malfunction, clogged fuel lines or fuel filter, a glitch in the vehicle's computer or from many other issues, according to HowStuffWorks. While in gear, it felt like the car was driving itself It continued to do this until I. Why does the car shake when idle and jerk when braking? If a car jerks forward while in the break position it is not the Automatic Break System but rather the transmission. Also, it jerked when shifted to drive gear from parking gear. Transmission stutter/jerk hard shift on 1st after driving a while: Running Rich, Jerking At Low Rpms And Surging Idle: Still A Low Rpm Jerk And Miss: car jerks when im crusing at low speeds not trans. The car only does this when i first start accelerating after it has been sitting over night or something, when the engine is not yet warm. I read that if you pull coil while car is running and performance doesn't change, that is the bad coil. But for the past few days when I'm stopped at a light and its in drive my car will jerk and shake. 2011 Chevy Equinox engine problem/stalling/rough idle. You will experience shakiness at all different times when you're in a car. I think my dad fixed whatever was causing the problem for now. Same symptoms here. Even under light throttle in gear, I was getting the shaking, so it's not an idle issue. It runs quite good now, but there is still the slightest bucking/surging at light cruise. Mercedes Throttle Possition Sensor Problem Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. The only time the car will stop jerking is when I put the gear in "Park". but that wouldn't cause jerking rpms. Start with your fuel filter and go from there to your pump and pressure regulator. Hello experts, My car is having a symptom of shaking/jerking when taking off from a stop. Carburetor Troubleshooting Guide. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. That is strange because I don't remember it used to do that before. While there were a couple of TSB's on this it was never a recall. While driving it seems like I have a dragging feeling on pickup, I shifted into 2nd gear and when I drive in 2nd gear it seems to run just fine, the hardest part is picking up from a stop- which is slow. While driving my car suddenly jerks starts running rough, then stalls when coming to a stop. Just recently it started to be slightly jerky when in idle and whilst driving. my car runs great and idles perfect but when i have the car in gear (anygear)at low rpm's like when im coming to a stop it jerks as if u were in first. Re: Truck jerking while on drive Post by RogerRod » Tue Jan 18, 2011 1:15 am it has 100k already, and yes i found out this week it was the plugs, i called 4 shops around my area as soon as i told them what year the truck was, they refused to do it, so it looks like i have to take it to the ford dealership, and is gonna cost me, but i. For a while we. Sometimes this causes acceleration to kick in a cupple secs after pedal is pressed. You may have to register before you can post: click the register link above to proceed. Looking to buy a new car? Read reviews and complaints about Cadillac regarding models available, design quality, customer service and more. Check vacuum hoses around the motor for rotted ends, cracks in them, disconnected, etc. Some guys are driving around with the a/c on to keep the engine running at a faster idle to keep the car from dying. Jerking is more like you are gasping for breath that stops suddenly and may be followed by the same pattern in short burst. Stay calm until you can pull over to check under the hood. Jerking is more on the sense of feeling, like a person who has a seizure, while sounds and noises are heard. However, the complaint from the driver was a lack of power. Problem CONDITION POSSIBLE CAUSE CORRECTION 7) Idle cut-off solenoid not working. I drive a 2004 Ford Taurus. We thought that this was caused by the engine running lean (some cat converter codes noted above). While you say that the timing and AFR are stable, another aspect I'd check is to make sure that the ECU isn't moving in and out of over run fuel cut, or that it's trying to apply an idle ignition compensation. The problem is, that my car jerks/hesitates when I fully depress gas pedal and then floor it. Fast idle and idle control is determined by the air regulator, the Auxiliary Air Control (AAC) valve and the F. Just started a few days ago. Sometimes this causes acceleration to kick in a cupple secs after pedal is pressed. person was a jerk. 2- 85000 miles. Car drives great I can hit a hundred miles if needed. The flickering is a result of voltage surges. 6 Reasons Your Car Stalls. BUT below issues still persist. That'll be next. However, the complaint from the driver was a lack of power. Hi I have been following this forum for a while. Engine Stalls (Check Engine Light May or May Not Be On). It happens a lot (not all the time) at higher speeds say at 60 k/m and up, but some times even at low speeds. The car seems to miss a little at idle and the miss gets much worse while driving at low rpm's. Sometimes I get it on my pants and shirt. It jerks every few seconds and there. However, the complaint from the driver was a lack of power. The problem is, that my car jerks/hesitates when I fully depress gas pedal and then floor it. There may be lots of reasons a car stalls at intersections, including low automatic transmission fluid levels, moisture in your gas, broken sensors, or issues with the EGR valve. Just this morning started to shake real bad off and on while driving. I have changed my spark plugs and injectors have been c. It consists of mechanical parts which may become worn and require replacement. Jerking is more like you are gasping for breath that stops suddenly and may be followed by the same pattern in short burst. Other times I'm hitting the upper-tier dash and sunroof. You will just need to clean that area using a special kit solely for. have you ever had a manual car that you let out the clutch without pushing on the gas and it jerks real bad and then it dies? Well my car does that while driving at low RPM's. Surging? Car jerks while driving Problems & Solutions RSX most people with IACV issues also report a rough/fluctuating idle along with the jerking at low-medium. U can consider the jerks to be quite vigorously if you continue to step further onto the accelerator. It does not do it all the time but when it does, it takes 2 or 3 times to get it to turn on. When your car's battery light comes on, you may feel alarmed and unsure of what to do. While at idle once the car is at running temp it idles low. but sometimes it takes entirely too long and too much gas to get it to move faster. It is quite irritating when your car shuts off while idling, especially when you are at the traffic signal. It consists of mechanical parts which may become worn and require replacement. Sometimes this causes acceleration to kick in a cupple secs after pedal is pressed. Surging? Car jerks while driving Problems & Solutions RSX most people with IACV issues also report a rough/fluctuating idle along with the jerking at low-medium. Check vacuum hoses around the motor for rotted ends, cracks in them, disconnected, etc. 2003 Honda Accord EX 4 cylinder high mileage. While there are a variety of reasons your Chevrolet Camaro SS has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. It's not that hard to soften the "jerk. Car always starts, but from a cold start, after a few miles, if I stop, idle was very rough, I sometimes had to step on the gas to keep the engine running and the exhaust smelled REAL BAD. In another case, I'm driving and coming to a complete stop. 6 Reasons Your Car Stalls. I have also changed the tensioner bearing, alternator pulley and idle bearing. Digging up the old thread, but I had the "jerking" issue yesterday. Jerking under load? While coasting? Under light throttle? Car Jerking At Idle. 2006 Chevy Cobalt LT 2. it will rev. TPS units sometimes fail in a way that causes the voltage signal sent back to the engine’s computer to be sporadic. Stay calm until you can pull over to check under the hood. The fault may be in the fuel system. Car always starts, but from a cold start, after a few miles, if I stop, idle was very rough, I sometimes had to step on the gas to keep the engine running and the exhaust smelled REAL BAD. There can be many causes behind this jerking motion, including problems in the starting system, fuel supply, engine or the exhaust pipe. Send the car to my usual workshop and a few stuff where replaced (spark plugs, air flow meter) but still the problem persisted. I parked the car and I can notice rpm raising high. Pulling good coil from spark plug should cause rough idle. When I accelerate between 15-25 mph, the car jerks violently. The car drives nicely, however when I turn the car on the engine SLIGHTLY jerk/shakes a bit, I mean everyone who drove my car noticed it when they first turn the car on, I don't think I'm low on oil or anything like that, I can't. For all your mechanical needs visit our website or call u on 07 3881 2900. - The car starts fine. it will rev up to about 1300 rpm then go from 1500 to 1100 and so on every half second for up to maybe 45 secondsuntil it warms up and then idles normalonly the initial idle is not steady at all. The car drives nicely, however when I turn the car on the engine SLIGHTLY jerk/shakes a bit, I mean everyone who drove my car noticed it when they first turn the car on, I don't think I'm low on oil or anything like that, I can't. Jerking is more like you are gasping for breath that stops suddenly and may be followed by the same pattern in short burst. I have had my car dyno tuned and everything worked fine but recently as it has gotten cold my car jerks ever so slightly only while crusing and AFR fluctuates from 13. Chevy Dude 1,357,690 views. when i shift the car into REVERSE, it jerks quite a bit, then as i go into NEUTRAL it jerks also but a Little less, as I move into DRIVE the jerk is there but less this time. Thats what i did, got a little tired of everyone asking why my car sounded like it was missing/shaking. It is in fairly good condition and I just hit 100K miles last week. You may have to register before you can post: click the register link above to proceed. Check vacuum hoses around the motor for rotted ends, cracks in them, disconnected, etc. Send the car to my usual workshop and a few stuff where replaced (spark plugs, air flow meter) but still the problem persisted. It is also a symptom when your car not only jerks but if you see your engine firing something out there while you are driving, then your car’s injectors are definitely messed up. 1) Car jerks when I accelerate slowly (Probably 2000rpm to 3000rpm). The problem is, that my car jerks/hesitates when I fully depress gas pedal and then floor it. 13 Answers. It sounds like a fuel delivery problem. what exactly is happening when your car vibrates when idle? I will take you through some of the reasons behind idle car vibrations. taking your car to a trusted mechanic for. It's been doing this intermittently for. If there are complaints about the problems mentioned above, the problems could be caused by a defective idle speed control/idle actuator (Figure 2). It jerks for a second or two. Automatic transmissions that shift hard, jerk or shake during a shift change may mean your transmission fluid needs changed or fluid level is low. A cam with a decent amount of overlap can make the car a little jerky at light throttle cruise. What do I need to be check. Like a dirty air filter, an improper carburetor also causes car jerking as it disturbs the fuel-air mixture balance. Slinging code po341. It's not that hard to soften the "jerk. Somtimes going to a complete stop pretty quickly i see the revs shift down and then when i try to accelerate soon after theres a bit of a lag, the revs go up and i can hear the engine working a little bit but theres no wheel movement and when it finally does go the car jerks. i am concerned on how to disconnect the idle air controller valve and …. 8l, engine code is F18B2. Hi I have been following this forum for a while. Your engine surges and stalls out. This company is not yet accredited. Any ideas or experience in this kind of problems? Apart from jerking thing car runs nicely. The fuel economy of the car drops drastically. but that wouldn't cause jerking rpms. Lately my BMW is jerking when I am in idledealer cannot diagnose and will not fix. The fault may be in the fuel system. 7) Check idle solenoid, especially for power/ground, replace solenoid if necessary. but when my air con kick in rpm drop to 0. I read that if you pull coil while car is running and performance doesn't change, that is the bad coil. Somtimes going to a complete stop pretty quickly i see the revs shift down and then when i try to accelerate soon after theres a bit of a lag, the revs go up and i can hear the engine working a little bit but theres no wheel movement and when it finally does go the car jerks. SYMPTOM SUMMARY The engine misses or idles poorly. In order for a car to operate efficiently, it needs to regulate the correct flow of air, fuel and compression. Have been driving like that for 2-3 days now. Does your engine shake/jerk while in idle? I just bought my car laslt month, 07 Wrx sedan, only 24k miles on it. A blocked catalytic converter is one of the most common reasons why a car jerks while accelerating. If there's a big jerk, does it happen when the car is cold? Does it happen when the RPMs are high just after starting the car? If so, let the car idle for a minute to get the RPMs down to a normal range (700 RPM) and see if it minimizes the jerking. My 2002 Honda Accord with 82500 miles on it jerks a bit when accelerating. Labels: car bogs, car help, car idle, car idle erratic, car idle issues, car jerks, car problems, Car will not start, erratic idle on engine, idle problem on car 1 comment: David Brown January 27, 2015 at 10:51 PM. The IAC valve is supposed to bump the idle speed up to compensate for this extra load put on the engine. 5k and car start jerking like hell. can feel the car tremble. About 3 months ago it started jerking while I was idling. I took it to the first dealership the replaced 1 spark plug and a sensor and said that it was the bad spark plug. The problem is, that my car jerks/hesitates when I fully depress gas pedal and then floor it. It jerks real bad while driving. The jerk was felt especially in 2nd and 3rd gears. I know of at least one Supercharging station that had parking spots on both. I can drive it first thing in the day and it won't happen until I've driven it a while or I let it. How exactly does Kia ISG work?. My 2017 Yukon Denali suffered from random "missing" - car would run rough, jerk and chug at idle and only sometimes throw a CEL. When I'm driving on the highway its perfectly fine, it only does this when the engine is idle. Slinging code po341. The valve needs to be replaced in this case. Letting go of the throttle in any gear jerks the car. Hi Austin, my car is a 2002 Pontiac Sunfire. Anyways, after sitting a week or so, Last night driving my cruze eco manual for a while when I would accelerate, the car would jerk and buck a little (it felt like in the drive train but My 2001 s10 (beater truck goes through oil like gas) jerks when its low on oil, so I'm guessing it could be the engine. Today on the way to lunch it happened again. All of a sudden it started jerking as if the fuel was going to be empty. How to arrest the moving gasoline engine while idling You have to set a gasoline engine for idling (running with no load) before the first use. And this may include issues for a car that stalls while driving or at idle, for example, a faulty computer program or a defective component used in a particular model. Dirty or Worn Out Spark Plugs Are the Most Common Cause of Engine Shaking Spark plugs that are dirty or worn out will not fire properly, which means they aren’t igniting the fuel in each of the piston cylinders in a timely manner. Just my 2 cents though. He revved the engine to almost 8000 rpms a couple of times (sparingly of course), and since then it hasnt stalled. While driving my car suddenly jerks starts running rough, then stalls when coming to a stop. If there's a big jerk, does it happen when the car is cold? Does it happen when the RPMs are high just after starting the car? If so, let the car idle for a minute to get the RPMs down to a normal range (700 RPM) and see if it minimizes the jerking. So far I've replaced the timing belt, camshaft and valve lifters. When I have my heat on full blast when driving, I can feel it jerk somewhat. Sometimes I get it on my pants and shirt. can feel the car tremble. A misfire may occur when your engine is idling, causing a rough or uneven idle. If you find it difficult to find the source of a particular stalling problem while driving or at idle, check for a possible TSB for your particular model. Happened again yesterday on the highway, flashing CEL and was able to get OnStar to run a diagnostic while heading for the dealer - OnStar said P0300. 1) Car jerks when I accelerate slowly (Probably 2000rpm to 3000rpm). Car jerks while accelerating. SYMPTOM SUMMARY The engine misses or idles poorly. Car Dies While Idling but Restarts Later: The Reasons. You may have to register before you can post: click the register link above to proceed. then if i give it more gas it will go. Carburetor Troubleshooting Guide. Your car's engine needs both fuel and air to do its work. Car jerks while going uphill and Check engine light is ON? If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions. It jerks for a second or two. More kilometers per liter. Digging up the old thread, but I had the "jerking" issue yesterday. The car drives nicely, however when I turn the car on the engine SLIGHTLY jerk/shakes a bit, I mean everyone who drove my car noticed it when they first turn the car on, I don't think I'm low on oil or anything like that, I can't. When I turn my heat on the car will hover sometimes to around 260 but recently my car has reached 260 so I finished driving home and haven't driven it since. Hello Bimbor, From what you have explained, I understand that your car begins to idle erratically when loaded (D or R gear engaged). Sometimes I get it on my pants and shirt. Try leaving your car idle in neutral and adjust the idle down to the same rev's it idles at while its in drive and see if it starts to miss. in first gearas soon as i press the clutch,its all smooth againwhat should be the cause o…. The Top 7 Causes. There has not been antifreeze on the floor in my car. So far I've replaced the timing belt, camshaft and valve lifters. Problem CONDITION POSSIBLE CAUSE CORRECTION 7) Idle cut-off solenoid not working. Flat, hill, doesn't matter. It also idles very rough and it jerks while I'm driving. Chevy Dude 1,357,690 views. My radio was still on and i couldn't start my engine again, I had to shut off the car and then start it from there. A Leak or Obstruction in the Car's Intake or Fuel System. - When driving, at an EXTREMELY light throttle (<1/4) it is fine. If there are complaints about the problems mentioned above, the problems could be caused by a defective idle speed control/idle actuator (Figure 2). I have the following two issues, and I want to get them find a fix before they cause any related damages 1st issue: Driving at a constant/consistant speed, my car jerks as if I were tapping the throttle peddle and then coming off of it. The cause is often a problem in the idle air control system. It has only run 125,000km and was garaged for a very long time. Also please check out the statistics and reliability analysis of Nissan Altima based on all problems reported for the Altima. Troubles while Idling and Driving slowly my car starts to sort of jerk a little; the only analogy I can make is that it's like it's burping :) I've found that if. After having the car serviced the engine does not operate smoothly when in idle. My 2003 Honda CRV will jerk as I am coming to a stop. Somtimes going to a complete stop pretty quickly i see the revs shift down and then when i try to accelerate soon after theres a bit of a lag, the revs go up and i can hear the engine working a little bit but theres no wheel movement and when it finally does go the car jerks. While driving I am able to adjust speed with the pedal. Jerk is not that violent and it does not make the stopped car actually move forward. Same symptoms here. have you ever had a manual car that you let out the clutch without pushing on the gas and it jerks real bad and then it dies? Well my car does that while driving at low RPM's. The Top 7 Causes. If a car jerks while driving, this is a strong sign of engine trouble. Difficulty while changing gears. These operations are affected when a bad throttle position sensor feeds erroneous data to the car's computer. Today he started the car fine and drove 15 miles or so and all was fine, after parking up for a while got back in the car to go to fill up with diesel and the problem came back, but way worse than before. Your car's engine needs both fuel and air to do its work. Car Stall Problems of Chevrolet Equinox - part 1 While at idle, the car stalled. There are several different reasons a transmission fails to work correctly. can feel the car tremble. Here is a car repair that brought me back to basics. The idle of a car engine is kind of like a human heartbeat: You can tell what shape it's in just by listening. The car seems to miss a little at idle and the miss gets much worse while driving at low rpm's. Feels like driving over reflector bumps in middle of the road. After I bought a Turbo Tweak stock chip, the car ran smooth. When it shakes the check engine light will flash rapidly then stop. i have brought the car in 3 times over the past 3 months and BMWs service shop cannot diagnose and will not fix. It is also possible that a transmission is worn out and needs to be replaced. Once stopped it doesn't idle normal instead it revs up and down. I will take it down on Monday and hopefully they will be able to sort it out. Here, the engine may stall while the car is moving, and, sometimes, while idling. Also, while driving at lower speeds it ocassionally jerks or sputters. Just when I get one problem fixed, here comes another. not a miss fire feel. The next step would be to ensure that the fuel injectors are as clean as possible. in a while. SYMPTOM SUMMARY The engine misses or idles poorly. The truth is that it’s not that serious to fix it. There are several different reasons a transmission fails to work correctly. I can give it gas and the jerking stops immeidiately. If you find it difficult to find the source of a particular stalling problem while driving or at idle, check for a possible TSB for your particular model. Worst when i on the aircon. When you put your foot down on the accelerator pedal, you are adding more fuel to the system and putting more pressure on the converter. This only happens as described at high speeds or while under heavy load (up a giant hill, trying to pass. Car always starts, but from a cold start, after a few miles, if I stop, idle was very rough, I sometimes had to step on the gas to keep the engine running and the exhaust smelled REAL BAD. I'm convinced all 3 problems are related to the ECM and it's controlling of the idle air control. The only time the car will stop jerking is when I put the gear in "Park". The gas pedal feels different when I'm accelerating, as if theres resistance to it. Today on the way to lunch it happened again. After I bought a Turbo Tweak stock chip, the car ran smooth. Is it only at idle? Does the vehicle only vibrate at low speeds, high speeds, or a constant speed? If your car only shakes while braking, the cause could also be different. Top 10 Causes of a Rough Idle 1. Always begin replacing the easiest and cheapest part first, which is the fuel filter. The car will also jerk/buck sometimes while at cruising speed (65-70mph). Usually it is idle at 400rpm without up and down. Use this guide, organized by type of shaking, to help figure out what is causing the shaking. car jerks,high idle, rpm fluxuates.