Question about 1992 GMC Sonoma

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Cold start problem

I have a 92 gmc sonoma p/u 4.3 w code. Starts hard in cold. Has new fuel pump, filter and coolant temp sensor.Has 55 to 60 lbs pressure on start.If I hit it with some starting fluid it starts right up.Cannot use auto car starter becaue it has to turn so long.

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  • gtoo Oct 21, 2008

    I never checked overnite but did put pressure guage on it in morning.When key is turned on it goes up to 60 lbs then drops.When I crank it it goes right up to 58to 60. I was thinking maybe pressure regulator or spider injectors?

  • gtoo Oct 23, 2008

    I had this problem before I replaced fuel pump. Thats why I'm thinking spider injectors or regulator?

  • yadayada
    yadayada May 11, 2010

    I know you have a new pump but does the system hold pressure overnight?

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Sounds like timing is off a bit.

Posted on Apr 17, 2009

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I should not drop more than 5 psi overnight, if it does it lets the fuel drain back to the tank, this causes long crank times because the pump has to refill the lines and filter before injectors get fuel.

Posted on Oct 21, 2008

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