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      05-03-2012, 06:49 AM   #76
paapaa
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Drives: 335i AT Coupe
Join Date: Aug 2008
Location: Finland

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?

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?
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