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  1. E46 General
    I had a misfire, purge valve circut open, lean on both banks, codes P0306, P0444, P0171 and another for the second bank, I have replaced the lower intake boot which fixed my rough idle but for some reason with only these reasons the codes seem to double up and say I have 9 codes but they repeat...
  2. E46 General
    Little bit of a backstory but put short, I hit a curb my oil pan cracked, i got a “heater sprayer not working” code and i called it a day. I got my oil pan replaced as well as the gasket and i changed my oil filter and gave a coolant flush while i was at it. haven’t touched my transmission...
  3. E46 General
    I have these codes on my e46 and I’m trying to diagnose. Can’t seem to figure it out so hopefully someone here can relate and help. Things I’ve done: Smoke test (intake and exhaust) no leaks Cleaned MAF Both O2 sensors were replaced with Bosch less than 5k miles ago Fuel pressure test - fuel...
  4. E46 General
    So me and my buddy bought a 2001 325i 2.5l 6 cylinder m54 and it was sitting for 2 years before we purchased it. We replaced the battery and starter in the beginning and then started chasing the codes. Car runs great for about an hour or two but then starts throwing codes. We erase the codes and...
  5. E46 M3
    Hi all, I have a custom built E46 M3, we are facing an issue which we could not solve yet, and we are running out of ideas. The problem started with a hesitation during acceleration, it is more noticeable in higher gears, e.g.: pull in 5th gear, but I can feel it in 3rd gear, and even in 2nd...
  6. E46 General
    I've read up on some discussions and have noticed that when your maf is going bad it typically reads lower... but that's not the case with my MAF. I currently have a P0171 code and have noticed that my MAF reads above 31 g/s upon acceleration or while on the highway. At idle it reads 3.7 g/s...
  7. E46 General
    Replaced the thermostat and the water pump recently, and changed out the coolant (which if it helps any, my car did not take alot of new coolant only about a gallon, despite me draining it as best I could, but the car isn't over heating and the temp gage stays steady in the middle, maybe an air...
  8. E46 General
    SCROLL PAST FREEZE FRAME DATA FOR QUESTION(S) BELOW ARE ALL DETAILS YOU MAY NEED/WHAT IVE POSTED BEFORE *sorry for making yet another thread i just want to give the most detailed info and try to get the most answers i can and hopefully help others who also have a similar issue and can't find a...
  9. E46 General
    So at idle (around 700rpms) I noticed my 02 Sensor 1 was reading 0 volts but my 02 Sensor 2 was reading between 0.30 volts to .65 volts and i was wondering if that's normal? Or is 02 sensor 1 faulty... I have no codes specific for 02 sensors but I have not gotten rid of my P0171 issues with my...
  10. E46 General
    I'm doing my vcg this weekend and replacing all my vacuum lines. while I'm under the good, I'm not sure what size hose, shop life on YouTube said 5/16ths, fcp euro on the other hand has like 4 different size hoses. I cant seem to find much about vacuum lines on this forum. could anyone help me out?
  11. E46 General
    So on my previous discussion, i discussed some issues i was having and posted the freeze frame data i got for code P0304 which i currently aren't getting anymore. Now i'm getting different codes being P0171, P16A7, P0133. Killer codes i swear. I've replaced my catalytic converters around two...
  12. E46 General
    ******UPDATE 9/30****** BaliDawg helped me out big time by updating my DME on 9/12 which was the factory firmware version from 2003-2004. For about 400 miles my car has been running flawlessly; the usual hesitation/studder at 2,800 rpms is gone and my idle issue seemed to be fixed. Within the...
  13. E46 General
    Hey everybody, I recently picked up a 2004 325i and I'm looking for some advice with the infamous P0171 and P0174 lean codes. I've tried a few super easy and cheap things that I figured would be a good place to start before spending large amounts of money on parts. Some background on the car: it...
  14. E46 General
    Hey guys, I searched the forums already and saw some issues similar to mine but nothing 100% similar. About 4 days ago, I got a P0102 code. I decided to grab some MAF cleaner and hit my MAF up a little bit and clear my code too see if that fixed it. So no biggie there. Following this, about a...
  15. E46 General
    Hi. I have a 2000 bmw 320i with 213k kilometers. It has the M54B22 engnine. My car threw P0171 and P0174 along with codes for camshaft position sensor. So i fixed the camshaft position sensor and decided to try and tackle the P0171 and P0174. I found out that the CCV system was broken so i fixed...
  16. E46 General
    P0174 - System Too Lean Bank 2 P0171 - System Too Lean Bank 1 P0313 - Misfire Detected With Low Fuel P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) I thought it was a vaccum leak and a BMW/German auto shop do a full replace of the vanos line and the...
  17. E46 General
    Long time lurker, first time poster. Sorry for the long post, but I can't seem to eliminate the lean codes and misfires at low RPMs. I'm a mechanic, but generally work on classic cars from the '60s through '90s, though I'm no stranger to modern cars. This, however, is my first BMW...
  18. Forced Induction
    Welcome. Thank you for looking at this post! I will give a short topic point to help any one who may have quick and easy information, then I will proceed to post detailed information about my E46. --2001 330CI 3.0L __NEW PARTS__ -valve cover gaskets full set felt pro -rebuilt the VANOS -fuel...
  19. E46 General
    Hey guys, First post! I was hoping that I can just find some answers lurking, but seems to me that my specific problem wasn't shared by anyone else. So here it is...My SES light was one a few months ago when it was really cold, my car died after backing out of a parking spot and driving in 1st...
  20. E46 General
    I apologize - I know there's too many of these, but I didn't want to hijack another poster's thread, and the resolution to my issue may take a different direction. I've read every thread I could find here and elsewhere, and have eliminated many of the common diagnoses for my Lean Code...
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