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**T.Dot_E30** · 12-27-2012, 02:56 PM

what happens when you rev it a bit? Does it speed up? Sound like it could be the idler pulley or something driven by the serpentine belt.

12-27-2012, 02:56 PM	#3
T.Dot_E30 Classifieds Moderator Join Date: Apr 2003 Location: T.Dot Posts: 9,086 Car: M3	what happens when you rev it a bit? Does it speed up? Sound like it could be the idler pulley or something driven by the serpentine belt. __________________