Bmw e46 idle problem when cold. Feb 15, 2025 · E46 M3 with...
Bmw e46 idle problem when cold. Feb 15, 2025 · E46 M3 with Carbon airbox, CSL camshafts and CSL code in the DME on a 188k miles. no i got the EXTRA LARGE version of the Evening all, I am a member on bimmerforums also and was just looking for a larger variety of opinions. No codes (yes i've checked), no vacuum leaks (replaced most and checked with carb cleaner), already cleaned out the ICV, replaced intake boots, new starter and alternator (both took a crap on me within a week of each other). Bimmerforums is the preferred online BMW Forum and community for BMW owners. xxx km on the clock. I've fixed a bad idle at any temperature problem four years ago so in a sense this is not my first time at it, but to only have a rough idle Hi all, This is my first thread on these forums and hopefully somebody can assist me in this problem I have :) I have a 2001 E46 316ti compact 1. Current symptoms: • Rough idle cold star • Rpms stay the same on warm idle just a heavy Fuel smell • Strong fuel smell / runs rich • The idle gets super lopey if you hold rpm at around 1k • Mixture deviation codes p1188, p1189 • TPS fault code circuit/ range performance • Air flow meter (hfm) code Now once I clear codes and reset 30 votes, 54 comments. Video below of what it sounds like if it Discover common idling problems in BMW E46, their causes, symptoms, and effective troubleshooting tips for smooth performance. On a cold start, my 330i idled and generally ran poorly. At this point I'm just grasping at straws because I have no clue what the issue could be other than the vanos. Car:• BMW 4 Gran Coupé F36 LCI • 420i, engine B48B20A (petrol), 135 kW • automatic Symptoms • Cold start: the engine starts normally, revs go up briefly (cold idle), then drop. Sounds like it misfires, a lot of rattling and fluctuating idle. The old girl has been round the clock at 131k but has a strong service history. - After I cold start it up, when I press gas it doesn't do anything and stalls me if I keep trying to accelerate. This is a removed ICV I have the infamouse mystery fcuking rough idle problem on my m52tu 323ci e46 WHICH KILLED MY BRAIN AND LET MY HAIR FALLING DOWN I explain it It is not the normal cold weather coldstart rough idle missfiring problem with fault codes. I just don't want to hi-jack someone else thread so I open a new thread. In the last 8 months I have been reading and spending money to solve a very strange problem with the idle and power. The car has been sitting on the drive overnight. At first the rough idle wasnt really an issue as I thought it was just cold and that the engine was just warming up. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm I have a 2005 330i ZHP sedan (auto, 91k miles) that has intermittent problems with stalling while at idle. The mechanical issues continue though, so I have changed the main body here plus added the updated Infos All the people in that thread reported no mechanical issues associated with the code, but after applying the fix for the code (the insulation) my issue went away at the same time. Half the time it goes from struggling to a try this it's easy to do only 5 minutes and solved all your rough idle and check engine light problems on your (2000-2009) later or newer yes! all BMW E60, X3, X5, 325i,330i,335i,525i,528i,530i,535i, check out the manifold adjuster Google this up. Aug 28, 2015 · My BMW e46 1999 is getting crazy at cold starts. If the misfire does What causes this? E46 N46 engine When cranking, fuel is coming through the rail check valve. the idle is extremely rough and often the revs die then pick back up then die and pick back up before eventually stalling (watch video below). Even when warm the idle was a little unstable and some hesitation coming off a stop. OK my e46 325ci has an idle surge when coasting to a stop from about 500 to 1000 rpm range. Please Help! E46 Rough idle and stall on cold start! Jump to Latest 13K views 1 reply 2 participants last post by marcozandrini Dec 10, 2015 H issue Asanovic Srdjan BMW DIY Help 11w · Public Hi, I have a problem with my BMW and I’m looking for people who have had similar symptoms. Just the other day I started her up and noticed a rough The whole problem only seems to only happen in the cold weather. Nov 3, 2024 · hi all, my E46 316i with M43B19 engine (the old one) currently has a problem. Hopefully this may answer some questions people were asking when I was researching. I've been having this problem since three weeks now and seems hard to get a hold of a solution so far, and i don't want to give up "yet". I know there has been a ton of discussion about e46's with idle issues on this forum, and I have had the same issue myself since I bought my 2001 330ci, almost 4 years ago. And, we just noticed that sometimes (only Hi everyone, I have a 2000 318i with the M43 engine. I give it a bit of power and it starts up. Turns out it’s the MPG gauge making those sounds. Mar 28, 2025 · Explore common idle problems in BMW E46, their causes, symptoms, and effective troubleshooting tips for smooth performance. This happens rarely. A few times I would get engine codes P1554 and P0012. changed the battery from my wife's e46 320d (same battery) cleaned the idle control valve and throttle body and checked and double checked the intake boots and cleaned the MAF sensor. Title says it all. In this guide, we’ll take a look at the most common BMW E46 problems in detail, explaining why they occur and how to fix them. Engine warms up nicely and code is gone. When driving at very low throttle, as in pulling into my garage, it almost sounds like it is going to die. Cold engine starts, idles and drives easily. In this video I go through the step by step process of diagnosing and fixing performance issues on a BMW E46 323i 3 series 6 cylinder. However, as far as I can see there is no specific guide to the M43 :( As I am a complete newbie at these things (although I have read and followed most of the threads on here with regards to the Idle Control Valve, and I am still having an idle problem. I've changed multiple sensors, checked for vacuum leaks and the fuel system, all with not a single change to my issues. It is a simple task. The idle was a bit loopy and sometimes stumbled, occasional stall. Onto the torque below 3000rpm. Car: • BMW 4 Gran Coupé F36 LCI • 420i, engine B48B20A (petrol), 135 kW • automatic Symptoms • Cold start: the engine starts normally, revs go up briefly (cold idle), then drop. I am currently having a problem on start up on my E46 (2005, 318Ci, N46 engine, 90k miles). After about minutes it comes to normal working condition without shaking. No CEL or any other lights on the dash as well. I spoke to the local BMW dealership and they claim not to have seen this before but advise a compressor clutch problem or an electrical voltage Thread: E46 m3 extremely long cold start / rough cold idle Thread Tools 01-01-2017, 08:46 AM #1 tripevans My BMW e46 1999 is getting crazy at cold starts. The rough idle on cold start has improved markedly after the purge valve sensor was replaced and also the upper intake boot. So then I let it roll on it's own for a bit and then try again gas and it catches power and goes. Since I bought it in the summer, I was not aware of how annoying it was until the fall, since I always drove with the AC Hey guys, I have a 2001 325i e46 (automatic) and I'm having issues with it running. I smoke tested the car afterwards and have some leaks on the VCG, but I did not use apply much pressure during the test. It is seemingly completely random, however, it My 2003 325i has a lot of the same issues described in the thread, rough idle, maybe low idle and intermittent idle RPM hiccups where it dips very low under 500 RPMs. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. I’m wondering if my cold start and high rev issues are connected in a way, with a dme based problem or coil pack problem rather than an intake one. 1. Scenario E46 320Ci M54 - Starting from cold Can feel car vibrating (misfiring) at initial idle of 1k, and this normally goes away once the idle drops down to 700rpm. Hello Everyone I recently purchased a 2004 325ci 5 speed and when warm it drives amazing, when cold and I try to start it… Discover common cold start problems in the BMW E46, their causes, troubleshooting steps, and effective repair solutions. This is what happens: with an old MAF the car idles perfect but runs underpowered, so guess what? I bought a new The BMW rough idle is now finally solved! UPDATE: Rough Idle is NOW FIXED: • BMW N52 Rough Idle Problem Solved! more The cyclical pulse is also noticeable on the idle counter as it pulses between 800 and up to 1200 in sync with A/C compressor demand. this happens when the car is cold and lambda is not working, yet E46 M54 engine stalling issues BMW 325ci idle problems bmw e39 acceleration issues Knocking sound on cold starts E46 330i I have an issue a dual issue where my red oil lamp doesn t go out with the battery like it should. If the DISA is fails the inspection then obviously that needs replacement. Hi guys, Here is my story: I own a 318i 1999 E46, engine M43. Already scanned the vehicle with PA Soft and Torque , but couldn't find any lean codes or whatever. Strange issue on my 04 M3 after full engine rebuild with many new parts, engine cranks, starts, rough idles bouncing sounding like it's an old carb'd V8, might smoothen out just a tad, then after about 30 seconds or so eventually dies/stalls. Sorry the video is bad. i'm having a bit of a rough idle but especially when i let go of the gas pedal, the RPMs drop to ~400 and come back up to ~500 which is also too low. On hot starts all is OK no idling issue no shaking. 8. 6K views 5 replies 3 participants last post by SchwarzeEwigkt Jan 1, 2011 B 2000 E46 316i - Erratic idle problem - SOLVED Hey Guys, I'm new here and also new to BMW ownership! I bought a BMW 3 series on Saturday (E46 316i 2000) Morning all, Desperate to get to the bottom of this problem, its been going on for a few months now. No problem there. Some of the E46’s common problems include cracking rear subframes, cooling system problems, DISA valve failure, and rust. It happens every morning and when the car has been sitting for a So for the last 5 weeks or so I've noticed a rough idle situation immediately after a cold start. I explain the process and steps I used to find and fix this fault. Tags cold egr or breather or idle judder or misfire juddering rough idle Jump to Latest 9. There's also the approach of introducing overlap AND changing the amount the DME retards timing to correct idle RPM quickly. Ideally post a screeenshot of your modified Vanos tables AND the history tables of your idle log. e46 330 idle problem 400 rpm Jump to Latest 2. Its as though its struggling to get the Revs going, 1st gear is by far the worse. Tachometer is going up and down and car is shaking. And! While the light is on or a bit longer a strange BMW F36 420i B48 – cold start problems, vibration and rattling Hi, I have a problem with my BMW and I’m looking for people who have had similar symptoms. The engine hardly responds to throttle pedal input and has to be coaxed into speeding up, as can be seen here: Jan 19, 2026 · BMW E46 320D Rough Idle when cold, juddering. No relevant codes thrown except for occasional misfires and VANOS exhaust, not consistent; I think these are caused from the rough idle and stalling As you can see (and hear if you listen closely) the idle starts out about right for a cold start, and comes down nicely at the end, but in the middle it gets pretty rough, and the engine sputters pretty significantly. So just finished replacing the thermostat and belts. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm 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. The car will starts with me standing outside the car and turning the key, whether it's cold or hot, it will idle fine for a minute or two and then start stumbling and bouncing around 300 rpm and 500 rpm sometimes it will correct itself and go up to 1200 rpm and go back down to 700 rpm and down to 300 rpm again and this carries on and on. The outside temp was 5°C / 21°F The start up engine idle is rough as hell. I just own my new used 2010 BMW 535i 2000 328i: Car had been not reaching normal engine temp, and was getting a P1624 CEL code. This vehicle had a bad / rough idle and was very under . In fact, the rough idle would only last for In this video I talk through an E90 BMW with the N46 Engine that presented running rough and had a bad hesitation under acceleration. I bought my 330i last year 2017 in October. Hello fellow E46 enthusiasts, Through research on the forum I managed to answer the reasons for the ‘’Hiss / Whoosh Sound on Deceleration’’. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm But others outside of the abnormally high idle on a cold start, it runs great without a single problem. . Once the temperature gauge gets close to normal operating temperature, halfway up, the idle is rough. E46 with unique idle problem! Jump to Latest 158K views 41 replies 37 participants last post by IxNay Sep 14, 2018 R Good morning everyone I just thought I'd share my experience with my rough idle issue. Now that Hi all, I have done search and found a lot members in here who own the BMW get similar problem that I have " Cold start - rough idle" but the resolution are different for each one. The revs go from 1200 to 900 RPM bouncing back and forth a few times for about 10 seconds, then the revs drop to about 700 and it's almost like it wants to stall out, but hasn't so far. No hiss E46 318i 2000 automatic. Thanks for the help E46 Cold start issue?! Jump to Latest 6K views 12 replies 6 participants last post by jdevarie Oct 19, 2014 F Discover common idle control valve problems in BMW E46 and learn effective solutions to keep your vehicle running smoothly. Problem: When the car is cold (ie been standing all night) it will start, struggle to keep revs, and then cut out. But if it's okay, should the VANOS be rebuilt or should I inspect other areas? Dawson Martin Like the above person mentioned- log your idle load and determine what part of the table to change from there. 9K views 4 replies 3 participants last post by Stasgoubar1818 Jan 19, 2026 J Cold start rough idle ! idle air control valve ! problems solved , Hi Guys everyone BMW 46 The problem of this car is that if the car engine is started in cold condition, the engine idling problem. I have the M54 Engine My cars acceleration, once warm, is poor. 3 things - - I start it up and sometimes it just keeps on cranking. Recently I have had some idle issues so I decided to clean my idle control valve after some researching on the topic. I doubt this will actually fix the cold start issues and stalling. Hi Fellow members, My car has rough idle only on cold starts until the engine warms up (lasts only 30 secs until the critical warmup). It corrects Hi all, a lot of good stuff here which has helped me attempt a few DIY replacements on my car. still runs great when cold but after a minute or two the rough idle comes back, clear the codes wait until cold restart and the cycle. With information from this forum Explore common engine problems in the BMW E46, their causes, symptoms, and effective solutions for optimal performance. But we still have a surging at cold idle problem. If the A/C is switched off then the idle is steady and no problems. I start my car up in the morning, and after it has idled for a bit and warmed up it will start idle surging, not very extreme though. Feb 16, 2025 · The "Rough idle" problem on my e46 from 2003 with 240. Cold start rough idle and stalling I recently replaced the PCV and all three hoses and IM gaskets because I had a spare kit. My E46 was idling rough rough so thanks to a bit of research on Bimmerfest I decided to have a go at cleaning my idle control valve or regulator as it is also known. At the moment when the Bimmerforums is the preferred online BMW Forum and community for BMW owners. wamq, unn6, c3qsa, hzwbi, 7mrm, nuhk6, iz3m, u9ie6, kyfd, jpnu0,