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      01-21-2013, 03:49 PM   #6
mAdTYzz
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Drives: 2006 E90 325i
Join Date: Jun 2012
Location: Sweden


Posts: 51
iTrader: (0)

First try spraying some start gas in the area where the booster is and listen if your engine is reving up. Then you clearly have a vacuum leak, probably the plastic hose/pipe from the booster. It's very common and I don't see why BMW would be an exception.