1991 Chevy Truck

1991 CHEVROLET TRUCK
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ZANGLE
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Engine Performance problem
1991 Chevy Truck 6 cyl Two Wheel Drive Automatic

91 chev 4.3 v6 pickup starts and runs fine, then dies after a few minutes if running. Have replaced the distributor,injectors,spark plugs ( all tune up parts ),fuel treatment in the tank ( for possible moisture ), the simple computer on this model was replaced about a year earlier. Have heard of a possible grounding issue for the engine ?
Feb 15, 2009 at 5:42 PM
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RASMATAZ
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starts and runs fine, then dies after a few minutes if running-Double check all ground points

To catch it do below immediatley to determine if its fuel or spark issue

Disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,distributor pick-up coil, ignition control module, cam and crank sensors- Note: If it doesn't apply disregard it
Feb 15, 2009 at 5:55 PM
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