Question about GMC Vandura

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Can a large enough backfire threw the tailpipe throw off your timing

1993 gmc vandura 2500 5.7

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No
but the back fire could be caused by a failed timing belt or chain
a back fire is just exploding fuel in the exhaust or inlet manifold caused when a valve has not properly closed and fuel fire is allowed to escape

Posted on Dec 17, 2016

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