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      05-03-2012, 08:02 AM   #77
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enrita's Avatar

Drives: 335i - Big turbos
Join Date: Sep 2008
Location: Italian in Sweden

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Originally Posted by paapaa View Post
changed from BMS dual cones to back OEM air intake.
dont know if not properly installed OEM air intake can cause
error P0174 System Too Lean (Bank 2)

I have catless downpipes, BUT the lean error comes only from the cyl 4,5,6 side of a downpipe.

Can i test easily and change the vacuum lines so that the error would maybe change to other downpipe..i mean are those 2 vacuum lines on the first page´s picture that i could swap and test?
? does not seem your issue is related to this thread.
did you put e85 in the tank?
maybe you should reset adaptations?
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