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Msoden82 Msoden82 is offline
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Posts: 7
Join Date: Sep 2018
Car: 2011 bmw 335i xdrive
Default 08-19-2020, 01:33 PM

Trying to update this thread for people who may have similar issues as me so that it is documented. After running a cold start log, I’ve found that my STFT in bank 2 skyrockets and is sporadic throughout the cold start (+2 to +30 for valued). I also have bank 2 AFR hovering around 15-17.5 while bank 1 is consistently around 14.5. I believe the DME is trying to compensate a lean condition by adding fuel.

I will be checking for a vacuum leak in the next day or two. Will be checking vacuum lines (which were just replaced) as well as pcv, throttle body, and intake manifold. Had the car recently walnut blasted so there is a possibility the mechanic did not bolt the manifold up perfectly or forgot to reinstall the line to my RB external pcv system on the TB.


2009 BMW 335i sedan 6 speed
Mods: DCI, charge pipe, FMIC, MHD stage 1+
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