Question about 1999 GMC Savana

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Correct fuel pressure on the 5.7 in my 1999 gmc 3500 van?

I can start the van, and it idles fine. When I drive it down the road, it won't accelerate properly. I replaced plugs, which it did need, and checked the wires and cap. The motor acts like it's running out of gas. I want to check the fuel pressure to make sure the motor is getting what it needs. Does anyone know the correct fuel pressure? There appears to be a hook up on the left rear section on the fuel rail when I remove the dog house.

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  • batoay Feb 19, 2009

    I already checked the fuel filter, it's good. Thanks for the specs.

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Check the TPS. If you code the ECU there might be a P121 stored in the OBD2 port. If tere is no code the a cloged converter will be your best bet.

Posted on Apr 28, 2010

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55 to 58psi is the correct fuel pressure also check the fuel filter ,you may have pressure without volume

Posted on Feb 19, 2009

  • mike loshbough
    mike loshbough Feb 19, 2009

    if fuel pressure is good i look at a clogged converter

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