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  1. E46 General
    Hey guys, I'm new to the thread. So, I have been doing some digging around and can't seem to find the right information that I need, (seems like some answers contradict each other). I recently bought a 325ci and obviously has some issues. So after purchasing a OBV2, some DCTs pop up: O8- Air...
  2. E46 General
    I'm at a complete loss, I've read around on multiple forums and have not found an similar issue. I have a very high fuel trim problem. When I start the car (cold or warm start) I sit at a 0% STFT until about 30 seconds, then it slowly creeps up to 27.3% at idle. When driving, they really go all...
  3. E46 General
    My car has a rough idle sometimes and revs very jerkly when setting of sometimes. It also, if left on idle for a few minutes sounds like its running on less cylinders(maybe 5). it's had new plugs, coils, maf, Disa valve checked, injectors checked. it has has a de cat manifold but it was mapped...
  4. E46 General
    hi everyone, I really hope someone can help me out here. I have a bmw 325i 2001 that has rough idling and acceleration lag. Weird thing is when I first start the car its fine until like a quick pull. After that it starts having poor acceleration and rough idling. However if im at a stop sign or...
  5. Europe
    I have a 2004 318i with the N42 engine. When I start the car from cold, all is fine right away. It idles smooth at just over 1k RPM. As it starts to warm up the revs drop as they should, just as it is reaching low idle at around 600 RPM it will drop to a low RPM almost stalling but it catches...
  6. E46 General
    I have a bad misfire on cylinder 2, Ive replaced my spark plugs again just last night. I swapped a known good ignition coil from cylinder 1 to cylinder 2 and the code didn't change from P0302 to P0301. I even did the test where you unplug the coils while it's running and each cylinder except no...
  7. E46 General
    I have a bmw 325i and when I start my car in the morning it pops and idles roughly looking for a answer
  8. E46 General
    I've been battling this issue for the longest time. Whenever my 2002 325i comes to a stop the idle will start bouncing around 500-1000 rpms. sometimes its worse, sometimes its not as bad. this idle surge comes around at every red light and stop light and its usually worse when I have the AC on...
  9. E46 General
    Hello everyone, this is my first post :) My BMW has a rough idle every time I start it when It's cold. After a minute or so the car calms down and starts working normally and drives fine. So far I've replaced the exhaust camshaft sensor and spark plugs, and cleaned the idle control valve as...
  10. E46 General
    I'll be posting updates on my journey of mastering DIY on my car. Preface: 2001 BMW E46 330ci convertible in orient blue with base package of non sport everything. Purchased in 2018 from Jacksonville FL from a less than reputable dealer. Top was working though 😁. Pretty much everything else was...
  11. E46 General
    So I was waiting in my 2003 330i and then it started idling rough nothing like limp mode but it was dropped to about 550rpm, I plugged in my laptop and checked to see if there were any codes and code 204 leerlou.. popped up, heard this could be just a dirty idle control valve what do you all...
  12. E46 General
    Greetings, i am new to this forum for a question on my m54 motor. I just recently rebuilt the top end of this motor after buying it with a blown exhaust valve on cylinder 2. Since starting it up after the rebuild it seems to have this consistent rough idle with the rpm jumping up and down. I...
  13. E46 General
    Hey guys got another e46 and am having multiple misfires only on cylinders 1,2,3, and 4. I also have mixture deviation faults on both banks. I did replace all plugs and a couple coils but it made no difference. Cars runs great but can feel the misfires at idle. Any ideas would be greatly...
  14. E46 General
    So I had lean codes for one of my banks before, this turned into lean codes for both banks, it's not idling horribly most of the time but it's definitely rough and I get a CEL sometimes, it only misfires noticeably when it's idling, and it seems to misfire less when it's cold. The idle is pretty...
  15. E46 General
    My '02 330CI has been having a weird issue the last few weeks where it'll randomly start idling extremely roughly and the car will begin to shake. Sometimes the RPMs dip so low I'm afraid the car's about to die. However, if I turn the car off and back on, it'll start to run normally again for a...
  16. Europe
    Hello! About the car 136hp made in 2000 had the vp44 pump swapped by the previous owner. I removed the EGR completly (bypassed). Swapped pressure converter numerous times (still bad performance) new vacuum hose, cleaned maf also disconnected maf and cleaned breather also no CEL. One moment to...
  17. E46 General
    Hello, first post so let me know if I should do give more info. Make and model: 2001 BMW 330i (104,000 miles) Lets start from least serious issue to most, firstly there has been some issues with starting the car, I will turn the key and it will turn over and “crank” for a few seconds then I...
  18. E46 General
    Hey guys so I’ve got a 2003 330i and I’m having trouble diagnosing what’s wrong with the car. Out of nowhere the car shakes pretty good at idle and has a large loss of power when driving. It threw codes for cylinder 3, 4, and 5 misfire and fuel cut off. I replaced the fuel pump knowing how...
  19. E46 General
    I know, I know that there are countless threads for misfires but this seems a bit trickier. Ive read and read and read and for some reason i'm still dealing with this issue. I've brought it to a couple shops and it seems like i'm not getting any answers. Just recommended things to replace that...
  20. E46 General
    Dear people, I am a new E46er having some issue starting up some times, My car 318CI died sometimes after a rough start, but in every time i started the car again it runs well, it does that only when it's a bit warm. OBD2 scanner showed P0420, any help!
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