Question about 2000 GMC Safari

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No power when hit the gas

2000 gmc safari my van idles fine for 5min when i hit the gas it backfires though the intake fuel pressure it @50 psi but it goes up and down do you think it might be my fuel pump or camshaft sensor.
i changed plug/wires/cap/rotor/fuel filters.
any help would be greatly appreciated

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  • seitcher1234 Nov 18, 2008

    thanx i will try the fuel pump replacement and respond after

  • seitcher1234 Nov 21, 2008

    thank you that worked fine now the van runs

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The fuel presure should be at least 60- 66 psi key on engine off, and then drop some when started, if it doesn't go any higher than 50 psi that would explain your backfire concern. If it is low then the fuel pump is weak. I have also seen soot on the little wires inside the Mass Airflow Sensor cause a concern like this.

Posted on Nov 18, 2008

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