91 Pontiac Trans Am

LINDSEYHONEY101

MEMBER
1991 PONTIAC TRANS AM
V8
2WD
MANUAL
126,000 MILES

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?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

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