Mechanics

TROUBLESHOOTING

2001 Chevrolet Van • V8 2WD Automatic • 152,000 miles

2001 chevy 2500 van 5.0 engine Itbegan with a slight miss, progresed to running rougher. Then it would cut off after sitting for a few hours it would start running for half hour cut off. After sitting a few hours start and run rough. Now it has died, just cranks over no starting. I replaced fuel filter. It seems to be pumping plenty gas. Please help.
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Lester E. Tyler
January 14, 2011.




http://www.2carpros.com/articles/car-cranks-but-wont-start

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 so, 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
Jan 14, 2011.


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