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  1. E46 General
    Was going through maintenance on my 05 325 I got back in December. Fixed P0171+P0174, replaced the PCV valve plus the hoses, valve cover gasket, intake manifold gasket, all 6 plugs and a coil. Cars been fine for a week, until the CEL popped back on. Pulled the codes and it’s just P0174 by its...
  2. E46 General
    hi all , I own a 2006 325ci M sport which keeps me up at night trying to figure out what to do or try It says it's running to lean which could be vacuum leaks sensors and all types of crap. What i've noticed: Worse mpg and overall fuel economy, loss of power after a little bit of driving( not...
  3. E46 General
    So, I’ve done quite a bit for my 2001 bmw 325ci trying to track down and get rid of this terrible misfire, but to no avail. This misfire is bad and only happens in cylinder 3 and 4. Here’s a list of things I’ve replaced checked and swapped: spark plugs, coil packs, intake boot, airbox, maf...
  4. E46 General
    hi i have been trying to get my car to run right but can seem to figure out whats wrong. I have a 2004 330i zhp and its been running lean. i have replaced the lower intake boot, injectors, coil, spark plug, and maf. i cant seem to track down the problem. I have a lean code for bank one and I...
  5. E46 General
    I have a 01 325Ic with 263k that runs flawlessly even with a engine light on.But recently the car lost power and to get over 50 miles an hour was a chore. The messagen was the engine was running lean. I had changed few months ago the fuel filter and last week changed the upstream O2 sensors and...
  6. E46 General
    I've been trying to source lean codes for awhile now, I've spent plenty of time researching how to analyze fuel trims to see what the problem is. I recently smoke tested the car and could not find any leaks, however I took the intake manifold off, replaced the ccv and all associated gaskets...
  7. E46 General
    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...
  8. E46 General
    Just completed the valve cover swap, drove the car for a day and a half with no issues. Then all of a sudden I have an engine light. M56 valve cover no obvious vacuum leaks when looking under the hood (VC is bright yellow so I would see it) misfire idle seems to come and go. (Brand new VC...
  9. E46 General
    Ok so I have 4 codes in my 2003 330i, P0174, P0171, P0420, and P0430. I’m pretty sure I need to replace my MAF because the live feed is under 3, my question is, should I be getting codes 430 and 420 because the vacuum leak or do I need to replace my sensors or cats?
  10. E46 General
    TLDR: Lean codes, improved after replacing a few things, only expensive things left to replace that I'm aware of. What could i be missing? Hi all, I'll try keep it brief. I have a 330i 2002 M54, I'm from the UK so don't have a secondary air pump with the car. I've been getting engine lights on...
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