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misfire
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  1. General E46 Forum
    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...
  2. General E46 Forum
    Hello, I have a 99 323i M52TU that misfires consistently at high RPM. The car also seems to have very inconsistent power. Some days I can barely rev out the engine to 6900 (car is tuned for that) and some days I have waaaaay more power. When the car is running good, I can redline as much as I...
  3. General E46 Forum
    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...
  4. General E46 Forum
    Hi, PLEASE HELP!! I have a 2001 330i. About a month and a half ago the car was idling rough, running lean, misfiring, super down on power and appeared to be in limp mode. I found the issue to be a bunch of torn inlet pipes and a faulty MAF sensor. I replaced all of these, scanned with the scan...
  5. General E46 Forum
    Got a real doozy for y'all. I got 15 codes. A couple are trans codes, as I am working on the transmission, and have the harness disconnected. One is an o2 sensor code. (Replacing them this weekend) The other codes are Misfire/Fuel Cut-Off codes. They're attached below. I'm suspecting fuel...
  6. General E46 Forum
    My friend owns a 2005 325i that had 3 misfires last week, he replaced the ignition coils and it resolved the issue. Yesterday he got the same 3 misfires. The spark plugs looked good and were recently replaced. I was just curious what might be causing this and how we might be able to fix it. Is...
  7. UK
    I have a 2004 bmw 320cd with 150k miles on the clock. While pulling away from standstill the car seemed to hesitate / misfire / judder somewhere between roughly 1200-2000rpm. At first i thought it might be a flywheel problem but then noticed it seemed like a strange misfire. If i carefully...
  8. General E46 Forum
    So a couple days ago i changed my pre cat o2 sensors in my 2001 320i as the bank 2 sensor threw a code and I figured id just replace both. However, the next day i went on a little road trip and noticed that throttle response wasnt nearly what it used to be and it just feels more sluggish...
  9. General E46 Forum
    hey guys I got these ebay headers installed on my 2002 330ci by a shop that said they were bmw specialists, after a week to install them i pick up the car and on my 15 min in at my house it started misfiring in cylinders 1-3 along with those codes it also said something about the bank 2 first...
  10. General E46 Forum
    I have a 03 325i and check engine light is on, there is a misfire on cylinder 1,2, and 3. And two random misfire codes. P0135O2 -heater circuit(bank 1, sensor 1), p0492, p0491-secondary air ignition (bank 1, and 2),p0102- mass or volume air flow circuit low input are the codes coming out. I...
  11. General E46 Forum
    Hi all I’ve got a 2002 e46 330i M54 which since I got it this time last year has been great until recently where I’ve been dealing with an ongoing lean fuel error for the past few weeks (I suspect it’s been around since I bought the car last year, but only just started getting engine light on)...
  12. General E46 Forum
    Can someone help me understand how I can drive for 10 or more or less miles before I get a misfire. Wouldn't this happen as soon as u start the car. How can it be at different times or sometimes not at all?
  13. General E46 Forum
    Hi guys, I have a 2001 e46 325ci with an m52tub28 engine (don't ask, old owner had if fitted as it was lower mileage). To add some context I've been overseas for the last 14 months and while away I got my brother to start it and warm it for me every so often. He doesn't have a licence so never...
  14. General E46 Forum
    325ci with 180000 miles, replaced vacuum lines on the rear of intake manifold, replaced intake manifold gasket, new fuel pump and fuel filter, new brake booster and mass air flow sensor. Car idles at 500 and doesn’t like to rev but as soon as it revs past 1100 or so RPM it completely smooths out...
  15. General E46 Forum
    Hi all, when my 330ci idles for about a minute it starts to go really rough and then starts misfiring, you can avoid it slipping into the misfire by holding revs at about 1k. So far I have replaced the following: MAF, intake boots, DISA valve, CCV diaphragm and hoses, Bank 1 sensor 1 o2 sensor...
  16. General E46 Forum
    Hello all i misfire thats almost impossible to diagnose I was driving home one day in my 2005 325xi and the engine light came on the car started to misfire and was about to stall, i scanned for codes and got a p0306, I cleared the code and everything went back to normal for 3 days Then after...
  17. General E46 Forum
    Hi all, First Post on here so let me know if I'm missing any info. Had a bit of a strange occurrence, btw I'm fairly new to this and most work was carried out by my dad, my mechanic and myself via YouTube videos. So I have a 2003 325ci, with approximately 130k miles on the clock. I purchased...
  18. ///M3 Forum
    So, I have a 2003 (AFAIR it is 2002-10) M3 with about 150K miles. The recent potentially relevant history includes a blown expansion tank, which appears to have been caused by the bad pusher fan. I think the engine did not have time to overheat while running without fan and low on coolant...
  19. General E46 Forum
    Hello everyone I seem to have a misfire with fuel cutoff on cylinder 2. Code P1345 or BMW code 239. I have tried multiple things to attempt fixing this but I just need help. I just got the car not too long ago and I love it I just want to fix the problem. What I have tried Swapped coils around...
  20. General E46 Forum
    Hey everyone, so as the title states, up until just yesterday, car was running fine, no issues. Yesterday I ended up getting an EML light which would also go into limp mode. This seems to have been fixed by removing the idle control valve and cleaning it out, code was P1500. After this, the EML...
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