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1994 GMC Vandura 3500 Question: wha is the timing?

 

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Visitor, 5.7L V8, Farmington, CT, April 27, 2011, 07:35

when i goin the the hiway and is an slope , the speed go down drasticly from 65 to 35 mph., lus power..

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  • Answer #1

    mastertech6371 April 27, 2011, 07:41
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     Master

    sounds like a clogged cat converter. take it to a shop for a check to verify and a bid for repair.

    Roy

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