BMW 3-Series (E90 E92) Forum - View Single Post - Why is My Exhaust Butterfly Valve Permanently Open! BMW E90

PKumarM3 · 10-07-2010, 09:55 PM

2 things that may be simple but might have been overlooked

1) is the rubber vacuum line connected?

2) there is a connector in the trunk behind the driver side rear taillamp. if its disconnected, the butterfly valve remains open.

10-07-2010, 09:55 PM	#2
PKumarM3 Air India 145 Rep 1,834 Posts Drives: 2018 Dodge Durango Join Date: Dec 2007 Location: NJ iTrader: (8)	2 things that may be simple but might have been overlooked 1) is the rubber vacuum line connected? 2) there is a connector in the trunk behind the driver side rear taillamp. if its disconnected, the butterfly valve remains open. __________________ PKumarM3
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