Mechanics

THROTTLE BODY NOISE

1993 Chevrolet Truck • 6 cylinder 2WD Automatic • 175,000 miles

93 chevy silverado with 4.3 liter has a loud whistle or squeal coming from the throttle body area at idle. Noise stops if throttle is opened any. Does not seem like a vaccum leak because engine runs smooth at idle
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Rtshelby
August 21, 2011.



Clean out the throttle body and IACV and see what happens

Rasmataz
Aug 21, 2011.