1992 GMC knock noise

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ShariNorman

09-24-2007, 08:53 PM

My 1992 GMC has a knock noise when accelerating. Help!

twistedthumper

11-23-2007, 01:43 AM

does it have the knock at idle? it could be a sparkplug pingin against the piston or a valve opening to far or not closing.