Question about 1989 Ford F 250

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1992 f250 5.8 litre engine back fire through airbox no fuel pressure changed out fuel pressure regulator no differant

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  • larry blais
    larry blais May 11, 2010

    Would you state everything that was done or tried? Did these symptoms just happen out of the blue or was there a repair that didn't go as planned? Back-firing thru the airbox could be related to valves or timing. I want to know what the fuel pressure is at.

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  • Contributor
  • 31 Answers

Sounds like you may have a defective fuel pump causing a lean condition thus causing it to backfire.

Posted on Apr 28, 2010

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