E46 rough idle cold start. It's not throwing any fault codes. it has been 6 months my car has cold start problem. My e46 seems to idle rough on cold starts but after some highway driving the idle seems to smooth out. Started with vacuum leaks. FYI, a number of people have actually been finding the oil fill caps leaking smoke on testing here lately. Dec 9, 2004 · The RPM's will drop to sub 400 levels and then thrump up to 1200~1500 and then almost stall again. 2. Sep 3, 2020 · rough idle after sitting for long periods of time. Oct 10, 2015 · 162 posts · Joined 2015. Plan is to clean the MAF and check the intake boot for cracks. I have reviewed most of the rough idling post and can't find one that points to my situation. E46 General Cold Start problem. After it warms up a bit, it runs perfectly fine. 20/30 seconds later, there's a sound like when you suck up something with your vacuum and it plugs the hose (THUMP or Dump) then runs perfect. Feb 27, 2024 · I am still quite new to E46's, but have had many older BMW's over the years. No issues other than rough idle for the first ~30 seconds after starting. I've posted on this forum a couple of times before, and have actually posted about this issue before! Essentially, my car had a rough idle and a lot of shaking when idle. - Engine runs rough during the first few minutes of engine operation following initial cold start. Over the weekend, it threw codes P0172 & P0175 - running rich bank 1 & 2 (one was pending, but I don't Apr 8, 2004 · It occurred often enough for me to experience it everytime I drove it. Nov 8, 2009 · E46 Forums. As the temps drop dramatically the cold start fuel enrichment is even more important for a smooth running engine. this is normal situation. I was just dealing with this issue. - check intake elbow for rips. other words rpm bouncing. This is somewhat normal on older cars during very cold weather, usually due to aging parts and lack of maintenance. account. No issues in summerCCV replaced, but its summer now so won't kn Jan 27, 2019 · Usually the cold start is smooth without any problem only the surging is there when drive the car, but today it was very rough for the first time, after warming up it was smoother. Repair Difficulty and Cost. I complained about Rough idle, Stalls while driving and RPM surges at idle. You could try starting the engine without the oil fill cap on and see what happens. Sounds like it misfires, a lot of rattling and fluctuating idle. Your idle control valve is manually stuck open. Hello fellow E46 fanatics. They changed 6 sparks for me. The process will repeat for 5~10 minutes on a cool day and sounds extremely painful on the motor and plugs. 3L V8 developed the same rough idle on start-up so many others have reported. Originally Posted by e90_guy. Jun 26, 2014 · Although problem starts when the engine is in open loop, the engine is into closed loop fuel control in one of the graphs in around 70 seconds. -Crank and start anywhere from 2-5 times while pumping gas pedal, eventually fires and stays on, idle is stable and in Jan 6, 2014 · Rough running, misfiring and SES/CEL/MIL coming on at start up. Lock car. Dec 21, 2010 · Symptom : On cold start pretty much before the water temp. Aug 18, 2011 · Rough Idling When Engine is Hot. It is fine as soon as it warms up. I'm having cold morning start rough idle with misfire on cylinder 5. Cold start followed by ± 10 min driving home, top speed 70 mph. Mar 25, 2013 · CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth. It sounded like at least 2 cylinders weren't even firing. E46 General. Fixed this problem but the rough idle isn´t totally gone. RPM dips to 450-500 when I come to a stop, giving me a scare like it might stall. Jul 24, 2013 · Car is converted to LPG and in cold weather (less than 10 deg C) rough idling until warmed up. Not immediatly but the revs will gradually drop and then the car wud misfire. then when i start to drive, at times when i shift it would produce a loud CLUNK noise, or sometimes even when i come to a red light and the car starts to slowly decrease in speed, it would at times CLUNK. After it dies once or twice, it idles extremely rough until the car warms up abit. Hard start when cold with a rough idle right afterward. - clean the idle control valve with carburettor cleaner. This only happens if the car is cold (hasn’t been turned on for 6+ hours). I started getting rough idle on cold starts and engine would shut off once i tried to put into gear and drive. Digg; del. Bavs108 said: Hey guys. Disa has been cleaned/checked, ICV cleaned and checked, new plugs, just finished the cooling system over haul. Hi guys! BMW owner for life here. With a hot engine at idle, check the fuel trims. My mechanic ran a diagnostic and found this code: PCode: P1478. Car on cold start has rough idle for some seconds before RPM goes back to stable mode, also car has hesitation on low RPM , or on acceleration. The E46 is awesome, but an awfully steep learning curve! I think (hope) I did the cold start, cruise, and hot idle logs correctly, though I'm not having much luck using the information they provide to point me in the right direction. Although last time I drove, the car was perfect. You need to leave the car at the dealership overnight and have them check for the injector corrections at the cold start. Driving the car is 100% ok. I usually let it idle like 5 mins then restart it, idle it some more, restart it. I had asked the folks at SeaFoam what they thought of the idea of pouring SeaFoam into the vacuum tube directly specifically to fix the cold start idle problem on our e46. Tags. It's super-exciting to get the car running- at least for me. I dont think either one would cause the car to stall. So if you go by thatthat means we can rev it up to 2kish for about 5 secs and that should burn the excessive overnight fueling. we all know at cold start rpm goes aprox. Then the car recovers for no more than 2weeks. Bought a can of throttle body cleaner and took off the throttle body Jan 5, 2015 · Cracked valve cover and/or a leaking valve cover gasket can be a culprit. This occurs about 9 out 10 cold starts and it is still summer here. Turn car off then open door close it. If the video does not appear below, please click here to view. Throw the stock tune back on it to see if the cold start issue goes away. I am currently having a problem on start up on my E46 (2005, 318Ci, N46 engine, 90k miles). With E21's in high school and college. It's only cylinder 5 I'm having misfires on. The following is the response from the SeaFoam Technical Service Advisor. The cold start problem seems gone for 2 days. In desperate need of help, to save my sanity. Note "cold" right now in Florida is 80F. Cold or warm. Easy test to isolate if that is the cause or not. . I played around with the fuel pump yesterday as I saw videos online hinting that cold idle problem. Bookmarks. On top of the rough idle, after driving to work, then back home (total of about 10 miles) it sets the following code: P0441 EVAP System Incorrect Purge Jan 20, 2012 · E46 General Cold start rough idle. Problem: Rough idle/cabin shake @ 850rpm with warm engine. 39,000 miles. I am having this problem now. but i still feel a bit of stuttering until the temp Nov 14, 2020 · The BMW rough idle is now finally solved!UPDATE: Rough Idle is NOW FIXED: https://www. My 2001 330i experiences rough idling when I stop and occasionally hesitates and sputters while driving. Jun 10, 2023 · Attached is a video of my BMW E46 318i that goes amazing one second and then rough idles and dies suddenly the next. Tags Cold Start problem. you just need to disconect a wire from the phase corrector's magnet (on the front of the engine head), when your symptoms appear. - new air filter. Also while it was idling rough I unplugged the MAF and nothing changed. I always use V-Power from Shell. First post but not new to the forum. I always get this issue when the car sits for a week. Vacuum leaks will also cause rough idle issues. I essentially did a big overhaul and been wanting to auto/track the M (Big dream of mine). Vanos a month ago. If i come to a stop in drive the car idles at about 500 rpm (without the a/c on). They also reprogrammed the DME. smoke testing machine. Aug 17, 2018 · I just ran an OBDFusion log. once it fires, it runs extremely rough for another minute or two and often chokes out. Coils and plugs were replaced in the last 2 months. #1 · Oct 10, 2015. A faulty ECT sensor is one of the most common sources of rough idle on a cold engine. >For long time, no noticeable issue but for awhile in the morning it didn't hit on all cylinders for about first half min. I had been suffering from cold start misfires and eventually the began occurring when the engine was warmed up driving down the road. BMW-FC: 146. #9. AF6YV7DBKJYG4QHHVY3V4EEEJEIQ/1SU5IVYCFKXGY\ CLICK HE Nov 29, 2014 · Hey everyone, new to the e46 game:hi:. Got codes P0171 and P0174 with P1351. Meaning will idle high to start, then "hic-up" as it falls to appropriate RPM as engine is warming up. 6. The compensation is seen in the fuel trims. Oct 1, 2013 · The question I have now is: Is it normal for a cold engine (or one that is at least a bit warm) to have this undulating idle behavior on start? The car seems to run fine when the engine is warmed up. 6) Using one of the following methods to read ECTS signal, WHAT is the engine temp read (a) after cold start, and (b) after engine Jan 23, 2024 · When in Drive or Reverse, the idle gets rough, RPM hangs around 550-600, and it feels a bit shaky. Start it up and it will misfire like a vacuum leak. I recently bought a 2000 328i and I began noticing a rough idle after I start the car when its been sitting overnight. -On cold start, cranks and fires. Giving gas while idling seemed to keep it from stalling, but as soon as I let off the pedal, the rpms dropped to a stall. Been chasing trouble codes/cold start issue for several months. When the engine is fully warm it idles just fine and starts just fine so as long as the engine is warm. Open car close door re start like you just got back in and see if same idle problems occur. ~147k miles. This car has been sitting around for a long time. After driving the car for maybe three or four days with the light being on, it will eventually turn itself off. When the engine is cold, the DME is in open loop control and can not compensate for the vacuum leaks. That fixed my problem and I had roughly the same thing. thoughts?? Looking at throwing money at that repair this month so lemme know! Apr 23, 2016 · E46 Forums. Do not be overly alarmed. - new intake throttle gasket. I have a 2003 330Ci. Mar 4, 2020 · Another M54 Misfire/Cold Start Rough Idle Thread. No suction when fuel cap is opened, checked all vaccum hoses and intake boots,new plugs, oil, oil filter, fuel filter, new oil housing gasket Sep 30, 2016 · Need help diagnosing this problem. Feb 27, 2019 · My 2013 Silverado with the 5. Also do a log when you are playing with the accelerator and get the engine to do its problem. Jul 12, 2016 · Here's what I've done to the car to try and fix the problems: -Replaced Fuel Filter, and the rubber hoses. Tags cold start misfire rough idle. 27800 posts · Joined 2012. Any kind of accessory load (a/c) on the motor (in drive) and it idles smoothly at about 750 rpm. Engine Coolant Temperature (ECT) Sensor. Then replace the injector or injectors depending on your warranty or piggy bank status. Dec 19, 2022 · NZ00Z3. Cold start rough idle. Then when giving it gas it stutters at about 1500 RPM, going from first to second, (Auto) and then bucks forward a little bit. hit the middle the car would idle very rough to the point where it would just die at times. -Cleaned MAF Sensor. Once it revs for a bit, everything is fine. PCode text: Evaporative Emission System Leak Detected (very small leak) Jan 27, 2015 · E46 Cold start Issues. Once the engine goes into closed loop, the cold start enrichment phase is no longer active. See if any difference. - Engine hesitates/poor throttle response during first few minutes of engine operation following initial cold start. Spray Brake Clean in area "in front" of throttle body & idle improves. 1100 (at cold start)and after few seconds drops at 700-750. I am new to the world so please go easy on me. - replace plugs. Any ideas? Some one else said replacing 02 sensors fixed it. I cleaned the throttle body, changed plugs, tested coils, no solution so thought to disconnect MAF sensor cable before starting the car after car rest Nov 29, 2015 · Have replaced all the normal wear parts and even installed a new dual vanos from Dr. but in my case rpm dips at 750 immediately (and engine starts to work rough)then rises up to 1100 rpm (engine smoothening) and then finally drops 750 rpm. If MAF is plugged in, I get misfire codes and recently coolant thermostat jammed open. One of the most common causes of rough idle on a cold engine is a faulty ECT sensor. Cold Start, rough idle. After a few times of this it clears up. Dec 6, 2013 · E46 328I with RPM fluctuation ONLY in the cold weather (until engine is up to temp). At first when I unplugged the MAF sensor that seemed to fix it, but after these different attempts at fixing it, it seems it still does it with the MAF Apr 22, 2016 · RPM dip and rough idle at cold start. What would cause this issue once it starts idling normally its fine. Repair Video. Feb 14, 2023 · I have been trying to tackle a rough idle during cold starts, which sometimes go with misfire on cylinder 2 or 4, or sometimes will stall (or big dip in rpm to 300-400) in the first 5-10seconds. Nov 29, 2015 · Have replaced all the normal wear parts and even installed a new dual vanos from Dr. Intake, crankcase air leaks and possibly a leaking power brake booster. Latest codes in the dme are p1344 (confirmed), p1348 (pending). I took the car to a bmw mechanic for diagnosis and an oil change. Repair Steps. May 13, 2020 · What's happening is on a cold start, it will idle like crap for about 20-30 seconds, then settle and run perfectly. Feb 9, 2016 · The only way to keep it running is to rev it immediately up about 2k for a couple seconds and then let it idle down to normal speed. M. First start of the day - first two minutes of driving very rough and jerky, then suddenly power kicks in and it runs well thereafter. Shot a bunch of MAF spray near the boots and DISA. E46 330i rough idle on only cold starts ? Dec 5, 2015 · The E3/E4 codes Deviation Too Rich means the engine is running Lean and the DME has attempted to Richen the mixture and it is still not able to correct it. The rough idle goes like this, car will idle just fine on a cold start for about 20 seconds but then begin to fluctuate rpms from 1000 to about 800 then idle fine and drop again. Last edited by SusquehGewgaw; Today at 10:50 AM . Sep 19, 2007 · 112 posts · Joined 2006. i'm also having a rough idle at startup, the RPM sometimes plays all over the place for around 20 sec, but most of the time as soon as i start it up, it reaches 1100 RPM, drops to 900 RPM then goes back up to 1100 until it warms up. I'm kind of confused. I'm having a somewhat difficult problem. OBDII code was o2 pre-cat bank 2 (cyl 4,5,6), and paid $400 Apr 28, 2017 · BMW e90 / 330i model 2010 , European version. Then I changed 4 of the ignition coil with the oem parts. com/watch?v=vlfTE31VlOwPatreon: https://www. When I drive it, everything seems perfectly normal. us; Mar 4, 2018 · I have a 2002 325i e46. Author's own image. I'll give a little background info, I bought a 2004 325i SMG tranny, with 85k on it. I have a 2001 330i (manual) on 130,550 miles or 210,100kms with an extremely rough idle and stalling issues when doing a cold start. Nov 15, 2006 · Hello, I am experiencing this problem (rough idle when cold) with my 1999 BMW 328i, automatic. The M52 didn't have a single engine issue during my ownership. Jul 28, 2021 · Repair Summary. It also 'kangerooed' when the clutch was lifted in 1st or 2nd gear without much throttle applied. Thanks in advance. key words: o2, fuel filter, maf, cps, idle, lumpy acceleration, no power, CEL, check engine light. They said they seen it and it produced these fault codes: 274E, 2745, 2744, Missfire at several cylinders. Oct 19, 2009 · Idle roughly, but steady. Parts Diagram. >Then one day CEL came on. They always make everything more complicated and overengineered than would be rational. Alot more noticeable the colder it gets too. So lately I've noticed that my car has a slight rough idle and what sounds like a misfire for about a minute or so when I start her up in the mornings which goes away completely once the car has warmed up. youtube. 3135 Views 8 Replies 6 Participants Last post by jfoj, Jan 27, 2012. -car has no vacuum leaks (smoked tested). Nov 23, 2021 · Bali. Once I plug it back in in stalls about 4/5 times and idles rough. By Joe Libertelli in forum 1999 - 2006 (E46) Replies: 4 Last Post: 05-07-2008, 12:27 PM. O-ring Gaskets Gone Bad. I've owned and maintained an E46 M3 for 7 years. Clean & reconnect. #11 · Aug 16, 2013. Jun 13, 2012 · For the past few weeks, my 2004 330ci has been idling a little rough for the first 30-60 seconds after starting. You have already done many of the common causes. Dec 2, 2011 · #1 · Dec 2, 2011. Then in the morning, I did an aux cable install for my kenwood kvt-516 and removed the glovebox and the install went great. It does not want to idle properly. No raise in RPM. After driving a few miles, the engine idles normally, and no smoke from the exhaust Just let car warm up then while running unplug maf wait 5-10 seconds then plug it back in. com/ideas/amzn1. com/GeorgeA Sep 20, 2013 · 2001 E46 M3 Rough Idle / Shaking. Read jjofj post on misfires, cold start post and it was very informative. Cleaned the ICV and cleared codes, no more codes, but rough idle at cold start May 15, 2012 · heztheone. #1 · Apr 1, 2020 (Edited) I bought a 2002 330ci with 160k that's has been battling to get the CEL light off for about 5 years. Technique Tuning 80# tune. It idles normal, then you press the gas a couple of times and it will knock it into a bad rhythm. Possible the idle air control valve is going? . Jun 26, 2014 · Smoke test when the engine is stone cold, even a slight bit of heat can seal things up. Replaced parts since the I own the car: Mar 4, 2020 · Most cold start/ rough runnings are caused by vacuum leaks. The problem starts once the engine reaches full operating temperature--about 15-20 minutes of driving time. amazon. I just replaced the battery. Sep 28, 2017 · I had a similar problem (rough idle, misfiring on cold starts), and the reason appeared to be malfunctioning phase corrector on my intake cam. Now the fun part: I've Cleaned the MAF, Changed the DISA valve, changed both Intake boots Apr 3, 2019 · BMW E39 M54 Common Cold Start Problems And What To Look For M52 M52tu M54 M56 Engines P0300, P0301 P0302 P0305 P0306Check out My BMW Website www. patreon. If we unplug the maf it runs better but still with a lower idle (500 ish rpm) red oil light comes on till the Aug 17, 2010 · Start with cleaning the throttle body and idle control valve. At times when i drive and as my RPM Car will stall and die, rough idle on cold start. Jun 11, 2017 · I have recently tried a few things and i have listed them below: - replace fuel filter. I picked this car up 2 weeks ago, first cold day here in New England the car turned on and had an idle surge from 1k to about 1400 and contined this until about a minute when it shut off and all the dash lights came on. #8 · Oct 17, 2007. Now the fun part: I unplug the MAF sensor and it will only stall once and it idles great. This is my first M54. The rubber boot leading to the intake and trottle body tends to develop holes or splits and road grime gets in and the idle valve stays open causing irratic idle, stumbling at start and decreased mileage. I've also noticed that it wont happen after the idle can make it past the point where the idle settles Feb 1, 2013 · I got a 2000 323i with M52 engine. Got fault code 08 Air Mass Sensor (keep in mind, this ONLY shows when MAF is disconnected. Ive been getting the lean bank 1 and 2 codes. The stutter stays, but is less severe after driving for a few minutes, and the rough idle is only after a cold start. The issues continue up to when the engine gets up to optimal temperature 90C-95C or 194F-203F. I cleaned the intake manifold and replaced the intake manifold adjuster. 1. “. When the CEL comes on, I'll turn the car off and back on and it will go away. The cold start problem rises again. After cold start when the engine runs at 1000rpms during the secondary air system pump operation for about 20-30s it drops the rpms to 700-750rpm and shakes a bit. Your injectors are dying. - replace MAF sensor. No trouble codes and the rough idle only lasted a few seconds. I can't seem to figure out this rough idle issue when in drive. #7 · Oct 22, 2012. Many rough idle when cold but good idle when hot cases are due to vacuum leaks. As for the sucking noise, most of these engines sound like they have a vacuum leak at idle, this is the idle bypass noise from my understanding. Jun 22, 2011 · Instructions from SeaFoam makers - Caution - make sure engine is running. Check for corrosion or damage to Sensor Pins or Connector sockets, as well as any visible wiring. New belt, new oil pressure sensor, new valve cover gasket & new battery. it sounds like this is quite a common problem with e46 o2sensors/ignition on cold starts Aug 27, 2023 · Internal Coolant Leaks. OBDII code was o2 pre-cat bank 2 (cyl 4,5,6), and paid $400 Sep 25, 2013 · 2001 e46 rough idle and stalling. After reading dozens of forums with multiple ideas I went with the cheapest/easiest first. “It's a BMW. If it is no worse, then there is likely a crankcase air leak. Your car returns to normal after the excessive fuel is burned. The majority if misfires at cold start and idle are due to Lean problem. i suppose the real test will be when it gets really cold. After starting the car up about a week later, idle was rough and bouncy, and would stall shortly after. Aug 28, 2021 · 27 posts · Joined 2016. Dec 9, 2015 · I've got an e46 that stalls on a cold start and has a rough jumpy idle. 3135 Views 8 Replies 6 Cold start rough idle. Jst at idle she goes all sick. Just got a new BMW one and put it on and still missing like a B on idle. Jul 22, 2008 · 1. BMW rough idle on startup diagnoses | Detailed instructions on smoke testing your BMW engine | easy step-by-step instructions. The rough running continues until about minute 4. I believe I've had a vacuum leak for a while, but the other symptoms came out of no where. To check for a vacuum leak do this check. In the early morning my car starts and sounds rough. #17 · Nov 23, 2021. No check engine light or any kind of warning light. Feb 6, 2023 · 2000 E46 328I cold start rough idle. But in Neutral or Park, it's all good at 700-750 RPM, smooth as butter. If you rev the engine to 3,000 rpm for 30 seconds and the short term trims reduces, then it is a Jul 5, 2015 · It corrects itself and then idles normally around 650-700 after 15 seconds or so. Nov 2, 2012 · The colder it gets outside the rougher the idle is upon start-up for about 20 seconds. You've fuel slowly leaked into the cylinder and that's why it only happens in cold start. I had driven the car the night before, and it was fine. He recommended changing the spark plugs, fuel filter, and fixing a vacuum leak (back of intake manifold -> secondary air pump). Made no difference. SYMPTOMS: when cold, have to crank engine for roughly 2-3 minutes, pausing between crank attempts so as not to burn out the starter motor, to get the engine to fire. Quick back story. It runs great but rough idle when cold. 1529 posts · Joined 2009. Jan 3, 2012 · This is happening when car is cold (it is winter here). #1 · Aug 28, 2021 (Edited) Welcome all my puzzle solvers, for I have quite the challenge. Jun 24, 2017 · Car will idle rough and low once hot. Car is E46 325ci from 2002. Recently undertook a massive project on my 03 E46 M3. The car sometimes idles rough and accelerates slow, when this happens I turn off the car wait a little bit and the symptoms Mar 9, 2009 · DIS gave me two variable intake manifold faults. Ive tried digging into this problem myself but yet it still seems to happen. Hi fellow e46 enthusiast I have a small problem my M52B28TU has very rough idle after a cold start and the rpms are very unstable between nearly going out -800 rpm and the second the temp gauge hits the first line it stops and idles perfectly and nothing while driving. Apr 1, 2020 · 48 posts · Joined 2020. Oct 16, 2013 · Oct 20, 2013. After that, the ICV or DISA valve could use checking. Replaced the fuel pump and it is like a new car! Sent from BimmerApp mobile app. #1 · Feb 25, 2010. Feb 22, 2021 · Press spring and carefully pull connector OFF the two pins of the Sensor. Car has 41K on it. immediately dies. Starts up fine at lunch and after work. Car has 110,xxx miles production date 01/2003. Dec 4, 2007 · well, since ive had the ignition coil replaced, the problem seems to have gone:excited: ive not had any engine light coming on or rough idle. nathansbmwwo Jun 3, 2021 · Cold Start Rough Idle e46. Apr 10, 2015 · Hey guys I am having some problems with my 325i passing inspection and some codes. Jul 26, 2011 · The engine idles rough when started "cold", meaning after being off for 10+ hours. Sep 22, 2008 · Here is my story, hopefully done now. There are several tutorials on this forum. -Replaced all Spark Plugs (the old ones were all fouled completely black, with oil on the threads) -Replaced Valve Cover Gasket. First start of the day - if after starting engine it is left to run until warm while car stationary then no rough running when moving off. Last friday the car misfired on several cylinders, stalled during initial acceleration (fault codes read for misfires and engine time out). Another thing about the environment is that in my place it is winter now, today it was -3C° in the morning. icio. If any are > 8%, then you have a vacuum leak. This is not the Vanos, becuase that is only effects idle in cold tempuratures, and its the middle of the summer. Doing This Will Fix Your **BMW Rough Idle Permanently** Add Me On Instagram @BMWDoctorOfficialGo to My Spotify Playlist which has all intro songs used on my May 26, 2024 · It seems like on a cold start it runs just fine, but after the car is running for awhile or if you drive it, that is when this starts happening. The other day the temperature in the morning was well below freezing the car started real bad. Apr 1, 2011 · Howdy Boys (and Girls) I've had this issue with rough idle on cold starts (usually when the RPM starts dipping down). Hi all, a lot of good stuff here which has helped me attempt a few DIY replacements on my car. Feb 25, 2010 · 410 posts · Joined 2008. If I rev it, the exhaust will pop and crackle when coming down, and on a quick rev, it'll stumble and the tach will bounce around before settling back down. One mechanic friend said VANOS unit or at least seal needs replacing. I had an E36 328 for 8 years and maintained that as well. Things replaced / inspected -new spark plugs and coils done 2 weeks ago. CLICK HERE TO BUY YOUR NEXT FEBI BMW PARTS ON MY AMAZON STORE https://www. Cold start idle is 100% ok. I advise you to check that first, since it's extremly easy. May 1, 2024 · Hey I have a 325i manual m sport 2005, I have the issue of when the car starts it idles very rough, bogging down and dying a couple of times. Jan 1, 2017 · E46 m3 extremely long cold start / rough cold idle. It is sputtering like crazy and smooths out slowly after about 20 seconds. Mar 27, 2013 · 400 posts · Joined 2007. Jan 4, 2010 · Latley on a cold start when I let my car idle its a little rough (the rough idle will subside once the car warms up) and if I countinue to let it idle this way, the service engine soon light will come on. What could be causing this? The two codes I pulled are for the MAF sensor and a thermostat temp sensor. Hard to qualify what is "normal" without physically being there, but I would not get too worried about it. In the first place, I took it to the dealer. I've been throwing in parts hoping to clear the cel/ses light and i'm running low on funds. Dec 10, 2018 · BMW E46 rough idle on startup | 1998-2006 3 series | M52/M54 six cylinder engine | Is the engine idling rough on your 3 series BMW? We'll help you fix it. once it warms up it runs and idles Nov 18, 2017 · Run the three standard log of cold start, highway cruise and hot idle and post the links here as per the instructions in the OBD Fusion link. Apr 10, 2020 · The cold start idle would throw misfire codes on cylinders 2 and 5 along with an evap leak code after about 2 minutes of idling. When the engine is hot, the DME is in closed loop control and can compensate for some vacuum leaks. This sensor signals the car's computer when the engine's Jan 5, 2014 · BMW E46 318Ci (N46) cold start up issue. It was attempted at a fix quite a while ago but nothing worked so it has just been sitting here. I either have to put it in gear and drive right away, or if i'm sitting around waiting for something or someone after a cold start, i have to manually keep the rpm around the 900-1k mark for a few minutes till the temp gauge gets to the middle of the blue mark. At very slight throttle pressure (barely more than coasting) it can be jumpy, from 500 to 1500 rpm. at pt qw wm wv gc xf fp ol ia