91 Pontiac Trans Am

1991 PONTIAC TRANS AM
126,000 MILES • V8 • 2WD • MANUAL
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[email protected]
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Hello,
I am having trouble with my 91 Pontiac Trans Am Fuel injected 5.0 standard. Whenever I start it and let it run and heat up and then turn it off, when i try to start it again it will crank but it won't turn over. Eventually I will be able to start it again, but sometimes it takes a few hours. I have replaced the fuel pump, fuel filter, and lines. It runs perfectly once it does start. Do you have any idea what the problem could be?
Apr 16, 2011 at 2:50 AM
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RASMATAZ
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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
Apr 16, 2011 at 3:53 AM