Question about 1988 Chevrolet C3500

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I have a 1988 Chevy C3500 1 ton PU. Engine runs great at idle and acceleration but when cruising it runs rough or surges.

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  • danclark Mar 08, 2009

    The truck has a 454 TBI

  • Mark Nichols
    Mark Nichols May 11, 2010

    What motor do you have in your truck?

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If the truck has a locking converter goin bad it will surge at steady speeds such as 55 mph the converter will lock and unlock causing you to feel an surging

Posted on Jul 12, 2009

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