Vapour Lock???

[JHarris1385]

Relay = Check - works fine
Fuel Pump = Check - you can hear it turn on with the key turned.


Fuel filter? = next
Distributor cap????

I have not gotten it start recently but it was only starting after messing with the gas cap. It just throws a curve ball in it to me.

[Dino]

Maybe the gas cap vent or the gastank vent isn't functioning. It can't suck fuel out if air can't come in.

Does it start every time with the gas cap removed??? If yes then replace the cap.

[JHarris1385]

Not everytime. But it seems to only luckily start after sometimes messing with the gas cap.

[Cobrajet]

I didn't pay much attention to this thread earlier because I don't own a GM vehicle. But, last might I got to thinking that your symptoms sounded a lot like my '82 Mustang. For over a year it would occassionally fail to start, or it would start, run for a minute, then shut down. I suspected fuel problems, too. But, it got worse, until finally it flat refused to start. Further troubleshooting showed no spark. Turned out to be the Ignition Control Module, a notoriously common failure item. A $30 part from NAPA. Replaced it and haven't had a problem since. Check your spark. Your Ignition Control Module (or whatever Pontiac calls it) is probably built into, or attached to, the distributor. Good luck.