Turbo question posted by Black Mammoth (Merkur 4Sale) on May 17, 2001 at 08:21 AM
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the impellers only move under pressure from the exhaust (spool). If you have a 5sp try pushing in the cluch pedal and listen to hear if the sound goes away at idle if it does its most likely your through out bearing. If it sounds like a whistle under full boost then it could be the turbos.