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Starting Problems

Discussion in 'General Chevy & GM Tech Questions' started by topdoc71, Oct 3, 2009.

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  1. topdoc71

    topdoc71 New Member

    I recently purchased a 1999 Chevy Silverado with a 4.8L V8. Sometimes when I turn it over to start it cranks for a bit and i have to give it gas to start it. Its not all the time but most.

    Any suggestions??
    Thank you
  2. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    Engine with port injection shouldn't need to be "gassed" to start. When you pump the throttle it gives the engine a shot of gas. I'd start with a check of the fuel pressure. Pressure should be 55-62 PSI (Pounds per Square Inch) Also, you might want to run some injector cleaner through the system. How does the vehicle run otherwise?
  3. Z71_guy

    Z71_guy Epic Member 5+ Years 1000 Posts

    my bet is on the fuel pressure regulator, if it is leaking at all it can cause extended cranking time
  4. CarpenterGuy

    CarpenterGuy Epic Member 5+ Years 500 Posts

    i agree with the above. its either the fuel pressure or the injectors.

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