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  1. E46 General
    Hi everyone, I've been working on getting my 2001 BMW 325I ready for Smog, but the vacuum hoses from the secondary air pump valve are completely broken so I was looking for what I need to fix it. I found this diagram with all the different parts from the valve to the exhaust manifold and I've...
  2. E46 General
    Guys, please help. Where should I start to get rid of p1188, p1189 car has very poor acceleration and feels so sluggish often. My intake boot is good no cracks. Im thinking about o2 sensors or maf. Oxygen sensors acting really weird. So bank 1 pre cat sensor voltage at idle stays steady at like...
  3. E46 General
    This is going to be a long one, but I'm going to try and explain my problem as best as I can. To start, I have a 2002 330ci 5MT with an m54 from a 2005 330i (done by the previous owner), 3.64 LSD from a ZHP, and some other minor modifications. I'm unsure if the DME was swapped to MS45.1, but...
  4. E46 General
    Hi I'm new to the community! I have had my 2001 BMW 325i for close to two years and I am experiencing problems. Right now I am in the 190k miles range and definitely feeling the effects. The main problem right now is poor acceleration. I have also noticed that when getting on the freeway and...
  5. E46 General
    hey!! I have a vacuum leak, and I thought this noise was coming from it, but I'm not so sure now after I replaced boot and rebuilt disa. I just want to know if anyone has an idea from where this exact noise is coming from, because if it isn't a vacuum leak and the code never comes back on...
  6. E46 General
    Ive been battling to get my car smogged for about a month now. I replaced all the o2 sensors, replaced the dm-tl pump and got that all sorted out. And now, after replacing those 2 things and clearing the monitors and codes, I can get all monitors to set, other than the secondary air pump...
  7. 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...
  8. E46 General
    Hi everyone, I just replaced my motor mounts and used an engine support bar to lift it up a couple inches. I drove a bit after the install and got an SES, just a p0174 code. Any first thoughts as to what I may have pulled/stretched/cracked/etc. by lifting up the engine? Intake boot on top looks...
  9. E46 General
    First time post, lurking for the last few months on this forum to repair my 02 325xi with 249k miles. I bought the car as a project, love fixing and tinkering with it in my spare time. I only have code P1085: fuel control mixture limit too lean bank 2 sensor 1. I’ve read JFOJ’s huge post, and...
  10. E46 General
    I jsut replaced the hard pipes on my 330i and went on to change the spark plugs as well. Once that was done, I started the car again and it was idling very rough with the tachometer dipping down to 300 and then back up to about 900. It began to die and it sounded like it misfired. Accompanying...
  11. 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...
  12. E46 General
    I just recently replaced my entire CCV system and watching the videos they said there’s supposed to be a vacuum like with this plastic thing in the middle of it it’s white on the left and black on right Anyone know where I could I find one my car doesn’t have it maybe the previous owner took it...
  13. E46 General
    Hello all. So my 2000 328i with 200K+ miles on it was sitting for about 2 weeks because I was waiting on some new parts. Went to start it, fired right up. Cylinder 3 started to misfire so I shut it off threw in the old (but not bad) coil pack I still had from when I replaced them. Car fired up...
  14. E46 General
    Hey guys, Case is i have had a engine light for a few months now on my 2000 E46 323i, The code is: P0173 "Fuel Trim, Bank 2 - Malfunction" I've been trying to figure it out, and think that I've narrowed it down to a vacuum leak. (Did a smoke test, and smoke came out, however I've yet to...
  15. E46 General
    I want to share my unexpected experience. (I'm an experienced mechanic and electrical engineer), but this is my first BMW. We purchased a sweet 2004 3.25i, expecting to do a lot of work including replacing all the rubber, cvg, DISA etc. After we did that the car had what appeared to be a vacuum...
  16. E46 General
    I’ve got a 2005 325i with 112k miles that I bought earlier this summer. SES light came on recently and I plugged in my obd2 reader and found it threw the infamous P0171 and P0174 fault codes (system too lean banks 1 and 2). I have an obd2 scanner that gives freeze frame and live data, and...
  17. E46 General
    Hi all, Although this is my first post, I have been using this site as a reference for a while now! I have a 2002 318ci (n42 engine) automatic. I’ve got an issue that’s now really bugging me! The problem started about 2 weeks ago when my alternator packed up whilst driving home along the...
  18. E46 General
    I have been having a problem for the past 6 months, where I have been getting misfire on all 3 cylinders on a single bank at idle. When I am driving, I can't tell if the misfires are present and car seems to feels fine otherwise. I have taken in the car to a few different Mechanics and one of...
  19. E46 General
    Hi guys, first post here. I just rebuilt disa using a repair kit. It did not come with the o-ring, do I put it on without it. I noticed the car makes a hissing sound coming from the area. Seems to run fine, no dash lights. Is there any way of knowing it it's a vacuum leak?
  20. E46 General
    I have an intermittent check engine light with P0174 (Bank 2 system too lean) and P0172 (Bank 1 system too rich). I just replaced the cylinder head, and a lot of the vacuum lines were old so I replaced everything that I saw. The CCV is new. All gaskets were replaced. There is one line, however...
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