Question about Chevrolet C1500

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1992 C1500 w/5.7 engine won't start

1992 C1500 w/5.7 Replaced fuel pump and relay - engine cranks, but no spark and fuel pump won't run while cranking. Normal fuel pressure during prime run - 11lbs - but drops to 0 while cranking. Ignition module and pickup pass tests. Looking for ideas. Thank you. Jeff

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  • Jeff Klein
    Jeff Klein Feb 09, 2012

    This truck was dead in a garage when I got the call. The owner said they were driving down the road, the motor "popped" or "chugged" a couple of times and died. They towed it home and called me. When I went to check it out, the fuel pump would not run even when I applied 12v to the gray wire that feeds the fuel pump. I am not very familiar with driveability issues and can't afford to guess with their money - or mine. Thank you again. Jeff

  • Jeff Klein
    Jeff Klein Feb 21, 2012

    I installed rebuilt distributor - and it fired right up. Either the module or the pickup was bad - or both.



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Have you checked the "Bump Switch" this is a small inertia switch which turns offf the fuel pump to prevent it running in the event of an accident. They are usually mounted in the boot(trunk/load area) . There should also be one mounted under the front of the vehicle to initiate the Airbags. They usually cut the earh return(at least it does on my Granada, XR3i and Sierra XR4x4) hope this helps.

Posted on Feb 09, 2012

  • Jeff Klein
    Jeff Klein Feb 21, 2012

    I installed rebuilt distributor - and it fired right up. Either the module or the pickup was bad - or both. Thank you for your input. Jeff



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