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      11-11-2012, 09:48 PM   #1
Private First Class

Drives: 335i
Join Date: Nov 2011
Location: nj

Posts: 138
iTrader: (1)

Weird whistling noise coming from engine

When I step on the as I get a high pitch whistling noise that comes from the engine. I hear it better with the window down. I know it isn't wind because it is only when I am accelerating. No error codes, no performance issues. Just this weird noise. What could it be???