Mechanics

CHEVY K1500

1993 Chevrolet Other • V8 4WD Automatic • 150,000 miles

My brothers 1993 Chevy 1500 4x4 with a 350 quits running after 20- 25 minutes. It just shuts off. Was wondering if it could be the ignition module or coil?It also has a hard time starting back up after he lets it sit for a few minutes to cool down.
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Mcmsargent
April 7, 2011.



Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-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, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

Rasmataz
Apr 7, 2011.