Mechanics

GMC TRUCK FUEL PRESSURE PROBLEM

1993 GMC Truck

Engine Performance problem
1993 GMC Truck V8 Four Wheel Drive Automatic

i HAVE A 1993 GMC K1500 5.0, I HAVE CHANGED THE DISTRIBUTOR, THE FUEL FILTER AND AIRE CLEANER, AND IT WILL RUN OKAY FOR A FEW MILES THEN WHEN I SHUT IT OFF IT WILL NOT START AGAIN, COULD THIS BE MY FUEL PUMP?
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DEEZER12
February 28, 2010.




Hi, with extended crank, have helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Around here, some of the national brand autostores used to loan out a fuel pressure gage, if you don't have one.

If your TBI, can you see the injector spray pattern, that doesn't mean the pressure is good, just that a rpm signal should be present. Any applicable trouble codes?

JDL
Feb 28, 2010.


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