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  1. E90/E91/E92/E93 (2006 - 2013)
    Good day everyone, I'm currently having an issue with my 2008 335i 6MT. I'm experiencing a misfire after replacing my injectors. Car has new Index 12's on all six cylinders. Coils and plugs were done in May 2022 and are OEM Bosch units. Car is completely stock besides BMS cone intakes, a...
  2. X5 E70 (2007 - 2013)
    I'm going to apologize ahead of time because this will be a long post but I want to provide all information that I can to help understand the situation. I bought a 2007 E70 X5 with the 4.8 N62 engine with 100,000 miles back in November. The previous owner was a small car lot. They said they...
  3. E39 (1997 - 2003)
    It started its life with a M54B22 and the previous owner decided to change the bottom end (don't know about top end) with B30 parts (crank, rods, pistons). After driving it for 2 years famous oil pump nut struck and it spun a rod bearing. I decided to keep it as B30 as well. It had this mystery...
  4. E90/E91/E92/E93 (2006 - 2013)
    2011 BMW 328i E90, started having extremely rough idle while driving along with catastrophic warning messages. Pulled codes and determined it was the crankshaft position sensor. Hired someone to replace it, and upon startup and 3 local drives everything was fine. The next morning the engine...
  5. E46 (1999 - 2006)
    I bought this car (2001 325i 5 speed) in January of 2022 and it drove flawlessly for 4 months of its life before causing a nightmare issue. The car has been on and off sitting for around 6 months between my driveway and our mechanics lot. Started at 152k miles and currently sits around 155k. The...
  6. F10 / F11 (2011 - 2016)
    Hey guys, i have a 2012 BMW 535i with the n55 motor, fully stock literally no mods or tuning, i noticed about a month ago that i was getting a drivetrain malfunction, drive moderately error, no CEL or codes, just the warning message and then it goes away whenever the car is shut off, and comes...
  7. E46 (1999 - 2006)
    Hi there, I had a mechanic come over after months of me trying to diagnose misfires (see here). He determined the first and sixth coils are receiving signal to fire, but not two three four and five. Checked the spark plugs and 1 and 6 are burnt black, 2-5 look sparkly clean and looked like the...
  8. E60 / E61 (2004 - 2010)
    Hello Guys, I have a 2007 6 speed manual 525i E60 N52 with 69k miles. Starts fine, then a rough idle surges up to around 12-1500 rpms then it slowly settles.. after it settles it almost stalls but "bounces off of 500 rpms up to around 7-800 over and over.. weird part is at this point when I...
  9. X5 E70 (2007 - 2013)
    Hey all, I need assistance. I have a 2009 BMW e70 X5 (n52). I bought it for my son's first car as a project. It would barely running when I bought it. It is misfiring and surging and not at all drivable. it will just quit. I ran a generic Foxwell NT301scanner on it and got 13 codes. Long...
  10. E90/E91/E92/E93 (2006 - 2013)
    I have a e90 318i (n46 engine), and recently had to replace o-rings for the VANOS solenoids as well as o-rings for the intake and exhaust camshaft sensors as they were leaking oil. After doing the repair, the check engine light came on, and when I scanned with INPA it reads 2A83 error code. The...
  11. X3 E83 (2004 - 2010)
    Within the past week my 2004 X3 seems to stutter upon acceleration. It is a manual and seems to be noticeable when shifting between 1st and 2nd gear and then from 2nd to 3rd gear at approx. 2000/3000 rpm. It is subtle for now and maybe just 3 or so stutters/shakes then drives normal. It feels...
  12. E60 / E61 (2004 - 2010)
    A week or so ago I got a P0304 (cylinder 4 misfire). I figured the plugs and coils needed changed since I was coming up on 100k miles. I changed both, with the plugs looking terribly Gapped and worn. Cylinder 4 plug had oil on the threads. cleaned oil out of the spark plug tube, replaced it and...
  13. E63 / E64 6 Series (2004 - 2010)
    I finished all the stems, gaskets, etc. and am stuck with three codes and some rough running. I am a bit stuck here and have tried all I can think of (and read on these fine forums) to get a good running motor. The strange thing is, when I clear the codes, and restart the car - it runs fine for...
  14. E90/E91/E92/E93 (2006 - 2013)
    So ive been having a misfire problem for a while now. I have a 2007 n54, tuned. i ran codes a couple times a months ago which first started my misfire fixing journey, it stated that i had a misfire in cylinder 2. A month ago i changed my cylinder 2 injector because i suspected it was leaky, i...
  15. E90/E91/E92/E93 (2006 - 2013)
    Kinda desperate I have a bmw e92 n53 engine and the problem im dealing with for a minute is misfires. Engine is stuttering from about 1300rpm to 2500rpm only at light load at about 10-15% throttle. Changed spark still the same, changed coils the problem went away then i got it tuned everything...
  16. E36 (1991 - 1999)
    Right this will be long. Last year my E36 328i from 95 started to develop an engine issue that I couldn't fix yet, today I ran out of ideas. It all started with stalling when it was idling, then it turned into a permanent misfire. At first, I plugged it on inpa, I had the following error...
  17. E90/E91/E92/E93 (2006 - 2013)
    Hey My N53B30 has been giving me issues lately, it has been progressively misfiring more and more on cold starts and im suspecting it to be injectors as i have checked out the coils but still making sure before i drop 3k USD (or 1.5k for one bank) on brand new index 11 injectors. It always...
  18. E90/E91/E92/E93 (2006 - 2013)
    Hey everyone, hoping for some help! After some work I am still pulling the code 2A9A. I did my valve cover gasket due to leaks on my 2008 328i. After I was getting multiple misfires on all cylinders, and long crank to start So far I have: replaced valve cover replaced both Vanos Solonoids...
  19. 7 Series - E38 (1995 - 2001)
    Hi All, Im having issues with my e38 735il non-vanos, built 10-1997. The issues stem from a lack of acceleration, when I put the pedal down in normal driving conditions it seems quite zippy (2000 rpm >). But when attempts to accelerate past that 2000 rpm barrier occur, they are normally met...
  20. E90/E91/E92/E93 (2006 - 2013)
    This is my first forum post and im at my wits end. Been reading for days trying to find a solution and no luck. My wifes 08 335i has been having a constant misfire cylinder 1-3 since we did a valve cover, spark plugs, and coil pack job. We have went through multiple times to verify everything...
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