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truck hesitates

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by therover87, Sep 12, 2002.

  1. therover87

    therover87 1/2 ton status

    Jun 24, 2001
    Likes Received:
    Long Island, New York
    i have an 87 k5 350 tbi and i just replaced the sending unit, fuel pump, and fuel pump relay and i had started it up for the first time after replacing everything and i was reving the engine a little and it was almost like vapor lock i would hit the gas and it pretty much did nothing, it runs its just that when i go to give it gas it hesitates, what could be the cause of this.
  2. Jay73K20

    Jay73K20 Registered Member

    Mar 4, 2002
    Likes Received:
    Is your check engine light on? Have you replaced the fuel filter. Does it have this proplem with out a load on it. If so I would start buy putting a fuel pressure gauge in line and check the pressure. It's proably the filter

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