Thread: JB4 Issues
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SINasTER SINasTER is offline
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Posts: 77
Join Date: Dec 2015
Car: BMW 335xi E90
Default 06-28-2020, 09:20 AM

Originally Posted by Mandrow7
Have a 2011 550i XDrive, just installed JB4 and ******* dpís. Iím getting codes about running too lean which I assume is the *****, but I thought the JB4 auto-cleared codes? Also, getting drivetrain malfunction on stage 1 or 2. Just put new plugs, maybe a little better but same thing. Have coils on the way, jus tlooking to see if there s anything else to check or something in case coils dont fix it either?
Change your MAP sensors and clean your MAF sensors also, had the same symptoms and that was my problem.

I get a rich mixture cel now but I think itís related to my new intake since I started getting those codes right after I installed them. PITA though and trying to get help but no answer yet...

BMW 550 M-Sport xDrive 2011
JB4 stage 2
Custom exhaust with 3" quad tips
Custom 3" D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag
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