Bmw Rough Idle Cold Start

if I do not go out for lunch for that day, then when I go home at 5pm and start the car it will ide rough - as it has been turned off for 8hours. The car now has a very erratic idle. The engine settles to a quiet and smooth idle from cold start. BMW Misfire Rough Idle and Skip On Cold Start Diagnosis No Faults 3 Series bmw m43 e46 3 series 316i 318i m43tu idle fluctuation icv valve control valve. RE: BMW E90 rough idle on cold start You have misfire codes, so it could be the plugs or coils packs, I doubt it’s the injectors since it’s a 323i N52 engine and they don’t have direct injection like the N54, that had injector issues. Rough idle, occasional cold start smoke, 987. A few days ago I've noticed that the car started running really rough on cold start. P050D CHEVROLET Meaning During a cold start, the Engine Control Module commands dual-pulse mode during Open Loop operation to improve cold start emissions. It just cranks but no. Based on my google search, specific to BMW world, these are: P1345 - Misfire Cylinder 2 With Fuel Cut-off P1346 - Misfire During Start Cylinder 3 Now, this rough idle would sporadically show up ever since the car had about 40k miles after the car sat for days. I have a rough idle after a cold start. Remaining disbalance. 1986 BMW 325es - IDLE IS ROUGH UPON START. The last few weeks when I start my m235i in the morning, it has a really rough idle and the rpms jump around a bit. My Car (2009 BMW 328i) has a rough idle + service light. 8is); E60, E63/64, E65/66 with N62 from 06/04 up to 02/05 production SITUATION. Took it back to dealer today and they can't find anything because they can't get a code since the check engine light isn't on. It has done this for a long time, but I just havent tried to find the cause until now. Rough idle , and slight whistling noise 2 Answers. It idles much better (but not perfect) after the bik. Took it back to dealer today and they can't find anything because they can't get a code since the check engine light isn't on. My Car (2009 BMW 328i) has a rough idle + service light. So far as the rough idle goes, (I cant say about the speedo) I'm going to hazard a guess you have a. ^^^ will cold start valve make your idle fluctuate. Idle improved as car warmed up. 8mm, the worse things get - hesitation on throttle response from idle, increased fuel consumption, and a coupe of other things it noted. When i'm on the road no problem. When engine is turned off or stalls, engine will not maintain idle once started unless gas pedal is pump. Now every time I drive it I now get 2 problems at IDLE. Then it drops down to 750-800. Rough idle again tonight at cold start, engine rocked back and fowarth at idle then stalled. Lately, my 2006 (40k miles) has had somewhat rough idle when starting after sitting for a day or more. Any pointers on what it may be? I'm going to take it in, and would like to be able to guess what it my be with my SA. then when I changed over to 98 it started to be rough on the cold startup , Maybe your onto something there. Idle settled @ around +/- 750 upon reaching operating temp. Afterwards, it idles smoothly and runs perfectly. tagged bmw rough-idle or ask your. The bike runs great at higher RPMs, good power, good gas mileage. Rough Idle could be caused by many things and is hard to diagnose. This explains why the slow swaying with cold engine and stabilizes with hot engine. 8 new spark plugs. From Cold Start, car has trouble holding idle until warm. Also when I start the car from cold, it works fine, but when it starts to warmup, especially when the gearbox lever is on P or D, or i start AC, or i start seat heating, the Rpm needle goes up and down , and the engine sounds like it is misfiring. Fine again after warm up. Air problem? started to do that today. Index 12s and about 3k miles on them. Cause: Coolant getting into the cylinders. It did this on the previous tank I gas too, so it's not likely bad fuel. This was a strange problem I encountered. I have following problem. Car runs rough on idle when cold - Help would be greatly appreciated 1 Answer. Idle improved as car warmed up. Buy online or call toll free. 265 new on web, not the end of the world. 0 - Hard start, rough idle Home. Remaining disbalance. E46 M3 Idle Drop Issues - Solved! Just thought I'd put this out there as I searched for a few months on this issue before I figured out what it was. The throttle advance barely helps and I have to hold the throttle wide open to get started having to then keep the idle above 2000 rpm until I have 1 or 2 bars on the RID. Until warmed the motor runs very rough, almost as if it were not balanced, or not getting sufficient fuel. I expect most 99-00 owners have experienced this symptom. The bike runs great at higher RPMs, good power, good gas mileage. tagged bmw rough-idle or ask your. I have taken the car to 3 different dealerships in the past to get it fixed and noone was able to figure out what was wrong. The only time my idle chugged, is when I started it after it had been sitting for 5 days, and the overnight low was 32F. Compression. This does not apply to carburetors with a butterfly choke. First time I could feel the car shaking a bit, and the note from the exhaust sounded as if the engine was misfiring. the service bulletin is for N55 thou. I will post up a vid of a semi warm start after work today and tomorrow morning a vid of a cold start. I've replaced plugs, coils, ECT sensor, PCV, cleaned the TB and MAF, fuel injector cleaner, checked for vacuum leaks. rough idle appears when cold warm or hot after, say, standing at traffic lights. I drive to work (8miles) and park it up. Useful links. E46 M3 Idle Drop Issues - Solved! Just thought I'd put this out there as I searched for a few months on this issue before I figured out what it was. The car started initially and the idle was around 1200RPM. My motorcycle is a 2006 R1200RT, about 67000 miles. This is not a good start to owning a new car. Do youse cold weather riders find it easier for the engine to turn over if you disengage the clutch (i. While waiting for the car to get warm, the idle became very low (400-600RPM) or rough and the car died. The car will be coming off the road soon to swap the head and other maintenance,. They replaced it but nothing change, still the rough idle. Do not understand why BMW would ever install a sensor under the valve engine cover where it is subjected to hot oil, gasses and heat. As the revs start to drop down the engine has a couple of splutters, not stalling though, and then runs as normal. During startup, it sounds and feels like the car is about to stall out. and occasionally misfire in cylinder 1. One of the most common problems is likely a rough running or poorly idling engine. First I will show you a video of such a rough idle and then list the possible problems that may cause that. During startup, it sounds and feels like the car is about to stall out. struggles). Bought my first BMW last month'06 330i, 36,000 miles CPOhave been noticing that it idles kind of rough and has a somewhat rough start up when it sits for a little bit (several hours), didn't think much of it until yesterday when I started it up after work and it really acted up. You can find the proper procedure to test the purge valve in the vehicle's service manual. In the mid 1980s, they released their first diesel engine, the M21. Then it drops down to 750-800. Most times the symptoms are worse at low RPM or when the engine is cold and when cold also accompanied by a rattle noise at start. Rough idle on cold start ups Ok well I do know that this topic has been beaten to death but on every post that I've read, there is another problem related to the rough idle like codes or something. I've been searching through this forum and google for any reason as to why this is happening. It runs rough for about 20-30 seconds and then the smoke and rough idle clears, however often hesitates and bucks for a few minutes when I start driving, and then runs normally until it's left to. 6 Engine - rough idle at start - So we've had the Q for one day now. The closer you get to 0. if I do not go out for lunch for that day, then when I go home at 5pm and start the car it will ide rough - as it has been turned off for 8hours. car goes like stink or will do 36 mpg. On top of the rough idle after idling for a long time and putting it in gear. 0 , hard to start in cold , hesitates , stumble , rough idle , until push acelerator at 2000rpm for like half minute , codes are 2DEB, 2D06,29E1,29E0 , 2E8D and 2DED. Check the choke. Louis BMW Club • View topic - X3 3. I've been searching through this forum and google for any reason as to why this is happening. Idles rough on cold start for about 30 seconds or so. On M52TU cars, 99-00, the failing vanos is manifesting cold weather cold engine start idle jolts and possible stall. It may also Run rough when warm, slight knock, no codes setting. On cold engine start up (the colder it is outside, the more likely the symptoms will manifest themselves), I am getting rough idle sometimes. , pull the clutch lever to the bar)?. After about 3 minutes of running the engine, if I turn it off and then on again, it will run and idle very smoothly and problem free. A few days ago I've noticed that the car started running really rough on cold start. Rough idle on cold start ups Ok well I do know that this topic has been beaten to death but on every post that I've read, there is another problem related to the rough idle like codes or something. This regulates the air coming in to your intake manifold when the throttle body is closed and it tends to get dirty, sticky and the motor inside could not turn the valve properly. BMW Misfire Rough Idle and Skip On Cold Start Diagnosis No Faults 3 Series N51 Engine2:35 AskTheCarExperts 304. BMW E30 uneven idle especially when cold. After start RPM is low 700-800 when it is colder starting the engine can also become more difficult and idle is very-very rough - after a minute or so the engine runs smoothly with no problem. BMW 5 Series 520D E60 - Cold start, stall, glow plugs then rough idle. I have a cold to warm rough idle problem that disappears once the engine is hot. tested ICV by applying 12V, clicks but not humming. Two main issues: Car does not cold idle. It's due for an oil service, so I'll be bringing this up, but is this common? Known issue?. Idle improved as car warmed up. Air intake leak:. SIB here: SI B 11 02 05 Engine January 2006 Technical Service This Service Information bulletin supersedes S. I am having a rough idle when cold problem and i am trying to figure out what the heck these screws are (not shown is the one near the ported vacuum): Here is a little background on what I've noticed and tried so far, any suggestions would be helpful:. My car had this problem as well and it has been driving me nuts for 6 months. 8is); E60, E63/64, E65/66 with N62 from 06/04 up to 02/05 production SITUATION. Higher RPM at cold starts is normal, but it should not be "rough". 2008 bmw 328i. when i put it in park or nuetral it idle up but it still lopes. White smoke and/or coolant odor may come from exhaust for an extended period of time at cold start as well. Runs well above idle speed even when cold. 8 it tends to have a bit of a rough idle as the warming up process moves through its stages. It does not matter if I leave the car outside or in the garage over night. BMW of North America is recalling 156,137 2010-'11 vehicles, including the BMW 335i sedan, because loose bolts could lead to engine stall. Upon revving the engine, the brake pedal gets softer and I can hear running water just behind the steering wheel (driver left). When the idle is low, putting the AT into reverse can put enough load on the engine to make it stumble. Might try putting some Techron in your tank next time you fill up and run through that thank, see if it cleans things up a bit. How to Repair Jeep Cherokee Rough Idle at Cold Temperatures April 6, 2019 auto Auto Repair 0 Some vehicle engines may exhibit a rough idle and/or MIL light "on" condition upon initial start-up after a cold soak when temperatures are below 50°F (10°C). My 2008 BMW 335i E90 shakes violently upon start-up when idle with the RPM quickly fluctuating between 500-800 RPM. AT cold start I'm getting rough idle, hunting between 700-1500RPM for about a minute. BMW has been in the diesel engine club for quite a while. So just bought this '12 Equinox and with in a week light comes on with code p0297. Engine is cold, like in the morning leaving for work. The burning smell only occurs when I hit lights after a few minutes of driving. when i put it in park or nuetral it idle up but it still lopes. It may also Run rough when warm, slight knock, no codes setting. Upon further investigation the Technician may find that P050D - Cold Start Rough Idle has been set. At cold start it fires and dies. SIB here: SI B 11 02 05 Engine January 2006 Technical Service This Service Information bulletin supersedes S. It is because rough idle when warm can either be caused by one faulty component or through series of problems. Cold Start Idle Air Control System Performance. When in gear, there's a "thump-thump-thump" noise, and it seems like the engine is threatening to stall. 911SC - hot start, rough idle problem 1983SC with stock 3. A rough engine idle or stalling is a common complaint, but in some cases can be difficult to resolve. The vehicle would misfire on a cold start and it would be pretty significant of a skip but no warning lights would set. Upon a cold start my 1984 533i will start, yet have a very rough idle. Below are the four most common. When engine is turned off or stalls, engine will not maintain idle once started unless gas pedal is pump. So I've noticed a rough idle (gurgling around 500/750rpm) come on lately at cold start It lasts for anywhere from 10-30 seconds before it jumps up over 1000rpm and idles fine from there. It idles much better (but not perfect) after the bik. 8i and my vehicle starts up great and runs fine through the fast idle normal start but as soon as it kicks down it runs pretty rough. Browse other questions tagged bmw car rough-idle or ask your own question. Check out the links in my helpful sticky at the top of this forum. It has done this for a long time, but I just havent tried to find the cause until now. then when I changed over to 98 it started to be rough on the cold startup , Maybe your onto something there. Always idled great after the engine warmed up, but power would occassionally dump when acellerating from a dead stop. From Cold Start, car has trouble holding idle until warm. It would catch, fire a big, chug, then die. I've replaced plugs, coils, ECT sensor, PCV, cleaned the TB and MAF, fuel injector cleaner, checked for vacuum leaks. Intermittently the car will start bogging down and surging, but only if it has been driven very lightly for a while, like in the snow. during the rough idle period it is doing a lot of backfiring in the intake area. Re: 320i E90 Engine vibration, rough idle and misfire i recently resolved my low frequency shaking at D/P/N with rpm needle fluctuating +/-50rpm at P and N, but stable at D the shaking is very low frequency type of shake, but very strong, can feel on the seat and even the floor. But the final solution, an engine temp sensor had tripped a fault which caused the Motronic to think the engine was already hot. But this is a very different sound altogether. Compression. Cold engine and problems of injectors. So I dont think it is the cold start valve? Once it is warmed up the idle sits around 1100. It might be the thermal time switch on the thermostat housing. What causes a rough idle? A rough idle can be caused by many different car faults. During winter, when I start the engine in the morning, it always has rough idle. The bike runs great at higher RPMs, good power, good gas mileage. BMW E60 520D M47N2 Engine which has rough Idle, if i am correct. Manual Idle Control Valve Bmw E46 318i DIY 92 e36 BMW idle control valve removal. My car did idle like hell before and after I fixed it. The bike runs perfect for about 10-20 sec. Cold Start Rough Idle Problem Please Help. e - the car has sat overnight). It idles rough and the whole car vibrates but is fine after. The solution is 'relative' simple: clean the entire intake manifold (erg valve included), because it used to be full of deposites (coke) and your idle will be smooth !!!!. Usually the engine fires up right away, but sometimes it's a bit slow to do so. As I arrived at my house, I let off the gas and there was a very loud backfire. raises to 100 degrees at times. 1998 (production 1997-09-24) BMW 540I 6-speed, purchased approximately 2 months ago. So I've noticed a rough idle (gurgling around 500/750rpm) come on lately at cold start It lasts for anywhere from 10-30 seconds before it jumps up over 1000rpm and idles fine from there. Rough run at idle. It will idle very roughly, sometimes engine dipping below 600rpm and you can feel the shudder or the car struggling and the rpm shoots back up again. The sensible method is to gather available knowledge about the engine misfire, focus on steps necessary to eliminate suspects and let the process guide you to its cause. Rough idle, occasional cold start smoke, 987. I have taken the car to 3 different dealerships in the past to get it fixed and noone was able to figure out what was wrong. On top of the rough idle after idling for a long time and putting it in gear. My motorcycle is a 2006 R1200RT, about 67000 miles. This was a strange problem I encountered. You may want to check this valve and make sure it is working properly. 2 (911hillclimber) I had a 987 gen 1, I was told at opc when I purchased the car about boxters doing this so wasn't too much of a shock when it did, was worse when it happened and people watching isn't what you expect, didn't really notice the rough idle though, I have a 981 now and sounds rough. for example I start the car in the morning 08:30 - it will idle rough. car goes like stink or will do 36 mpg. 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. When starting in the morning, the car misfires and generally runs extremely rough. So I've noticed a rough idle (gurgling around 500/750rpm) come on lately at cold start It lasts for anywhere from 10-30 seconds before it jumps up over 1000rpm and idles fine from there. What to Look For. I have an old shape 520i (6 cylinder). When leaving work, I went to start the car. Despite this, I get poor cold starts in the morning, accompanied by rough idles, as well as P0171 and P0174, the standard "lean" codes. E36 M3 Evo rough idle problem SOLVED. Ok here is the problem that is really driving me nuts. Idles rough on cold start for about 30 seconds or so. Re: F10 N52 B25 523i RPM Hunting/Fluctiating on Cold Start have a look at this. Only on cold start though. Rough idle was due to the injectors not pulsating correctly as the damper was not working well. All seemed fine, so I concluded that the throttle bodies may be the reason for running rough. After about 3 minutes of running the engine, if I turn it off and then on again, it will run and idle very smoothly and problem free. Fortunately, it's easy to adjust the idle mixture with a simple screwdriver and a quality vacuum gauge. X5: Bmw X5 2009 3. Codes: - 29CC Misfire several cylinders (actually all 6) - 2A7C Variable camshaft timing control, intake, cold start - 2A82 Vanos intake - 2A98 Crankshaft - inlet camshaft, reference - 3100 Boost pressure control, deactivation. Not a threadjack. On M52TU cars, 99-00, the failing vanos is manifesting cold weather cold engine start idle jolts and possible stall. Fine again after warm up. BMW 330i E92 strange rough Idle. Cold Starting Cold Start Note 1. I have Two fuel injected BMW bikes that start just fine in cold weather but the heat lamp might work for you. Car rough idle and stuttering - but only when cold Hi everyone, Recently my car has started to idle roughly and stutter for the first 1-5 minutes depending on how cold it is and how cold it is outside. Lower Oil weight to 5w-30 and it will smooth out idle The M44 simply always rough idles Vacuum leaks are always the cause of rough idle on the M44 The ignition components used on the M44 are a poor design The fuel pump causes rough idle before it fails The cam position sensor is the problem most of the time. My motorcycle is a 2006 R1200RT, about 67000 miles. Start by pouring some injector cleaner in at least two tanks of fuel. Cold starts usually result in higher idle speed for 30 seconds or so, then down to 650, no shaking, etc. It does not matter if I leave the car outside or in the garage over night. Most times the symptoms are worse at low RPM or when the engine is cold and when cold also accompanied by a rattle noise at start. Air for the idle system is obtained via a hose tap in the intake boot upstream from the throttle, and fed into the engine through a manifold tap next to the cold start valve. However, at idle, it's a little rough and feels like it has an occasional miss. It's due for an oil service, so I'll be bringing this up, but is this common? Known issue?. I have encountered a rough idle condition on just about every vehicle from a Ford F150 or a Jeep Cherokee all of the way to a Geo metro. I have backup pump stashed in rover but there's a guy who installed 2 higher rate pumps because it is a bit slow like 45 min - 1hr for full transfer. If left for a moment to go through the initial warm up from "higher" to lower "semi warm" RPM range a yellow check engine light comes on. When in gear, there's a "thump-thump-thump" noise, and it seems like the engine is threatening to stall. It ended production just a few years ago in 2009, so many of these unique Bimmers are still on the roads today. It does not matter if I leave the car outside or in the garage over night. Also don't spray near the exhaust manifold, and do it outside, or in a well-ventilated. I am having a rough idle when cold problem and i am trying to figure out what the heck these screws are (not shown is the one near the ported vacuum): Here is a little background on what I've noticed and tried so far, any suggestions would be helpful:. I have Two fuel injected BMW bikes that start just fine in cold weather but the heat lamp might work for you. Q: Vehicle idles rough when I start it up in cold weather. Hi, I have a 2000 328i. Upon revving the engine, the brake pedal gets softer and I can hear running water just behind the steering wheel (driver left). There can be a variety of reasons why your vehicle is idling roughly. Here's what you need to do to find out the cause of your problem, and get your car back on the road. Start by pouring some injector cleaner in at least two tanks of fuel. The failing o-rings cause a pressure leak, which translates into a rough cold idle and other fun problems. If this switch has a fault, it will cause the idle control valve. Might try putting some Techron in your tank next time you fill up and run through that thank, see if it cleans things up a bit. if I do not go out for lunch for that day, then when I go home at 5pm and start the car it will ide rough - as it has been turned off for 8hours. When checked, it did not close fully and has an open gap. Idle FluctuationSIB - Bimmerfest - BMW Forums. This problem has been an on and off problem for the past 2 years. With cold start problems for the first 30 seconds or so the engine is not even in Closed Loop so anything that will cause a Lean mixture will cause a rough/uneven idle. Also when it is very warm, it drives awfully, it missfires a lot and it seems like it has got no torque at low revs at all. With the introduction of direct fuel injection systems, GM has revised the cold start control system to reduce cold start emissions. I have replaced the AFM, O2 sensor, tested the ICV,replaced the TPS, replaced the engine temperature sensor, and replaced the intake manifold gasket. '88 735i, very rough idle in warm weather, better in cool weather, great in cold weather. My Car (2009 BMW 328i) has a rough idle + service light. It does not occur when I just let the car idle. 91 BMW 325i Touring 90 Golf 20v Had a spark plug out and it was choked up black is this from running rough or is. After warm up I drove it 60 miles and it ran great. car runs terrable until i restart it and then runs perfect. When my bmw 540i starts up it shakes and the idle is a lil rough? Why does my car idle rough on cold start ups? BMW E39 540i rough idle, FC P0305? More questions. On M52TU cars, 99-00, the failing vanos is manifesting cold weather cold engine start idle jolts and possible stall. Rough Idle. Hi For the past couple of weeks when the temperatures have been at or below around 4 degrees I'll start the car from cold, it will fire up, make a feeble attempt at idling then just die. The engine settles to a quiet and smooth idle from cold start. It's not hard to start, but the idle is pretty rough for a minute, until it warms up. I am having a rough idle when cold problem and i am trying to figure out what the heck these screws are (not shown is the one near the ported vacuum): Here is a little background on what I've noticed and tried so far, any suggestions would be helpful:. I have symptoms nearly identical to the video occasionally (regular cold start in the morning, weird start after work), car has been serviced, carbon cleaned, plugs are fine, had the vacuum line system gone through for an unrelated issue (valve runner actuation CEL) and no issues there, etc. Rough Idle. Most times the symptoms are worse at low RPM or when the engine is cold and when cold also accompanied by a rattle noise at start. Car rough idle and stuttering - but only when cold Hi everyone, Recently my car has started to idle roughly and stutter for the first 1-5 minutes depending on how cold it is and how cold it is outside. when i put it in park or nuetral it idle up but it still lopes. When the engine is started cold, the engine temperature sensor sends a signal to the DME control unit to provide a richer mixture. DIAGNOSIS: Using a Scan Tool (wiTECH or StarSCAN) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems are functioning as designed. struggles). BMW E30 325i Poor idle on cold. With the introduction of direct fuel injection systems, GM has revised the cold start control system to reduce cold start emissions. rough low idle on cold start for 10 seconds You can also get an inline fuel pressure gauge if "priming" fixes it. P050A BMW Cold Start Idle Air Control System Performance. When I went out to start the car the next day it would not start. Don't expect your M30 to idle like a new car, but here is some tips to improve it: Check list from the less expensive to the more. Also when I start the car from cold, it works fine, but when it starts to warmup, especially when the gearbox lever is on P or D, or i start AC, or i start seat heating, the Rpm needle goes up and down , and the engine sounds like it is misfiring.   Then i'll start it up again but this time the car will put the glow plug light on first, then make a much better job of starting. Always idled great after the engine warmed up, but power would occassionally dump when acellerating from a dead stop. Rough Idle & Stall While Stopped. Upon further investigation the Technician may find that P050D - Cold Start Rough Idle has been set. car runs terrable until i restart it and then runs perfect. Has anyone had a similar problem and been able to solve it?. to/2rf7qC6 JB4 Bluetooth Connect Kit: http://amzn. However, at idle, it's a little rough and feels like it has an occasional miss. After 2 min holding the RPM at 1500-2000 it ran fine. Remaining disbalance. It will idle very roughly, sometimes engine dipping below 600rpm and you can feel the shudder or the car struggling and the rpm shoots back up again. Generally BMW says start it up and ride off. When cold starting my 2. smoke did go away. Louis BMW Club • View topic - X3 3. The burning smell only occurs when I hit lights after a few minutes of driving. On M52TU cars, 99-00, the failing vanos is manifesting cold weather cold engine start idle jolts and possible stall. It did this on the previous tank I gas too, so it's not likely bad fuel. Cause: Coolant getting into the cylinders. At cold start it fires and dies. The throttle advance barely helps and I have to hold the throttle wide open to get started having to then keep the idle above 2000 rpm until I have 1 or 2 bars on the RID. Buy online or call toll free. Bought my first BMW last month'06 330i, 36,000 miles CPOhave been noticing that it idles kind of rough and has a somewhat rough start up when it sits for a little bit (several hours), didn't think much of it until yesterday when I started it up after work and it really acted up. Borrowed an ICV from 102 engine, stalling partially improved d. The driver will complain that during a cold start black smoke will come from the exhaust and the engine will have a rough idle and minimal misfires. In this video, I'll share BMW ROUGH IDLE FIX! HOW TO! My setup!: JB4 G5 ISO: http://amzn. To get to the jets you will have to take the carburetor(s) off the engine. '88 735i, very rough idle in warm weather, better in cool weather, great in cold weather. I was able to sync them when warmed, got it to run as it should and left alone overnight. I apologize if the following post has been addressed somewhere else on this forum (I have researched but yet to find a clear cut answer). Share Thread. I drive to work (8miles) and park it up. Remaining disbalance. Once i tightened things down, the blue smoke was pretty much entirely gone. The cold start system could be opening the valve or the valve could be leaking. The car will be coming off the road soon to swap the head and other maintenance,. it runs fine when i first start it, but soon idles low/rough, but only in gear. to/2wg07x0 Digilan. For about a year and a half I have an issue with jerky acceleration at lower speeds. Q: Vehicle idles rough when I start it up in cold weather. My car had this problem as well and it has been driving me nuts for 6 months. The solution is 'relative' simple: clean the entire intake manifold (erg valve included), because it used to be full of deposites (coke) and your idle will be smooth !!!!. Usually the engine fires up right away, but sometimes it's a bit slow to do so. Cold Start- Rough Idle (long!!!) At some point during the month of August the Roadfly forums are going to become archive only. e - the car has sat overnight). Unplug the VANOS actuator solenoid electrical connector. Never had any warm idle issues. I've replaced plugs, coils, ECT sensor, PCV, cleaned the TB and MAF, fuel injector cleaner, checked for vacuum leaks. 6 thoughts on “ Running Rough?? Check engine light? No Problem!! ” Brooks December 16, 2014 at 11:11 pm. It was available in both 3 Series models as well as 5 Series. On top of that the injectors started to make quite a big noise. If there is oil in any of the wells, this can cause misfires. No codes stored in the engine. YouTube - ‪07 GSA rough idle issue‬‏ It's been checked with a GS911 - nothing - and the coils have been checked and are fine. I just went out to car and started it (approx 25 degrees outside where car is now) and car started fine but again a rough idle after the cold start. Rough idle is often caused by clogged injectors fuel filters etc.