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Thread: Rough Starting

  1. #1

    Default Rough Starting

    I have a buddy I put a new motor in his 94. 350 TBI. The truck runs great but if he parks it for any length of time, like over night, the gas will drain out of the line and he has to turn it over a bunch to get gas back to the throttle body. Once it starts it will run fine sometimes with less performance for a few minutes untill it warms up.
    My first thought was fuel pump but is there anything else that might cause the gas to seep out?

  2. #2
    Master Mechanic
    Join Date
    Apr 2009
    Location
    Owens Cross Roads, Alabama
    Posts
    634

    Default

    ive heard of this before.i dont know what would cause it but try turning the key to the on position (but dont crank it)and let the fuel pump prime the line.wait a few seconds then try cranking it.i may be way off but wouldnt hurt to try?sombody else may be able to help you out a little more
    -Dylan
    2004 Silverado 4x4
    4.8L
    1986 K5 Blazer
    8" Superlift w/39.5 super swampers
    1992 GMC Jimmy "Blue Bomber"
    4.3L Vortec

  3. #3

    Default

    Fuel pressure regulator might be slowly losing the pressure. Try letting the pump prime the lines first before you try to start it. Good luck.
    Mike - OREGON

    2001 chevy silverado 4x4. 5.3L, 6 inch Fabtech lift, 35" Toyo MT's, 17" Weld Racing wheels, arma coating on rocker panels. No exhaust after cat. Pioneer stereo

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