535i single turbo

Snertz

Private
Nov 7, 2016
46
NY
The second log looks a bit better, AFR isn't tanking and trims aren't maxed out, fp_h is where it should be.

Boost is still quite a bit under target, the fact it starts dropping after 4.4k rpm makes me think there's still a leak somewhere, maybe a loose coupler.
 

Naldo12

Private
Nov 10, 2019
28
The second log looks a bit better, AFR isn't tanking and trims aren't maxed out, fp_h is where it should be.

Boost is still quite a bit under target, the fact it starts dropping after 4.4k rpm makes me think there's still a leak somewhere, maybe a loose coupler.
Yes is leak on the throttle body from the clip
 

Naldo12

Private
Nov 10, 2019
28
You need to go into the settings on the JB4 and change the TMAP setting to 3.5bar, otherwise it won't work. This is separate from setting what map the JB4 is running.

Given the age of the car I'd highly consider replacing the HPFP and perhaps the injectors. BMW did put out a recall for both, you might be able to get the dealer to replace them for free.

View attachment 34772
 

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