truck idle to high~ something else?

Truck idle to high!?

~~~in my original post i forgot to mention that the truck dies when you put it in gear. ~~~i have a 1978 F150. i have installed a new starter, and now its idled to high. it also back fires and will shut off. its like the engine isnt getting any gas/fuel. i really dont know. i have also recently replaced the fuel pump.anyone know what i can do to fix the idle and why it might be shutting off?

3 Answers

  • 1 decade ago
    Favorite Answer

    Have you checked the timing? have you adjusted the carb since installing the new fuel pump? Both might have been set different in the past to help the truck run with the older fuel pump.

  • 1 decade ago

    Need more info...6 cyl or 8 cyl? Mechanical or electric fuel pump? The starter has nothing to do with it staying running or not. Did you change the fuel filter? Are you sure the pump is pumping enough fuel? Was the truck running ok before replacing the fuel pump? (are you sure it actually needed a new fuel pump or was it possibly another problem?)

  • Anonymous
    1 decade ago

    Could be the carb

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