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#2: 11-14-2011, 12:23 PM
SurlyOldManMN's Avatar
Title: Burning Monkey
Location: MN
Car: 2010 LGTL
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Could well be loose IC -> TB hose and/or folded gaskets. Pull the intercooler. I got the "balloon whine/honk" when the gaskets started to fold over and also to a lesser extent when the hose was wiggling loose.