Question about 1988 Ford F 150

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Truck is surging

1988 Ford F150 4.9 liter 6 cylinder with ported fuel injection, manual transmission. When I get to a steady speed the truck will surge. It will not do it when the engine is cold, but will do it when it is at normal operating temperature. I replaced the spark plugs, plug wires, cap & rotor, fuel filter, air filter, breather element, and changed the oil. No fix to the problem. Any idea what could be wrong?

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  • Travis Humphries
    Travis Humphries May 11, 2010

    Try changing your Gas cap????

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Ho the throttle position sensor will cause the truck to surge.

Posted on Jan 31, 2009

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