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Apologies to begin with, this is a longish-winded post: I have a 2010 BMW E60 535i xDrive. The car just hit 82k miles. I've owned the car for about 6 months now, and only started modifying it. So far I've done a muffler delete, BMS DCI, 1-step colder plugs, Eldor coils, and a JB4 - usually have...

Videos can be found at the Google Drive link with file names describing what they are https://drive.google.com/drive/folders/1I0e0hHoKrDlJiTvVxUFwwl5GvLVCzczs Hey guys, got a super weird issue. I have this 135i with~115k miles. Has a 30ff, turbos feel laggy. Did a pressurized smoke test and...

Hello all, So after ignoring all of your advice about not buying a 335I, I went and did it. Anyways, I have an interesting problem. When I set the JB4 Map to 0 and try and do a 3rd gear pull, the CEL comes on, with the error 30FF If I then put Map 1 back on, I can WOT without any engine...