Pontiac Repair: 1990 pontiac 3.1, mass air flow sensors, air flow sensors

Question
I Just Drove home a 1990 3.1 Grand prix 60 miles from where i bought it,it Ran Great,Now it will die as soon as it starts, fuel pres. fine 40-50 no codes i can read with the onboard OBD 1 checks clear Just(12)Seems after it sets for some time it will start and run great a Little bit 5-10 Min. then die die die.
no back fire, smooth start and die.?

Answer
Hi Roger:

does it have an erratic idle then die? or just start stall? if it will not start at all then you have to check for injector pulse and spark. You could have a crank sensor issue here if it doesn't have spark or injetor pulse. That vintage car had all kinds of issue with engine control modules and also if equipped mass air flow sensors would go bad. I can't remeber if a 1990 had one of not 1987-89 for sure did not sure about 1990 and up. It's been a realllyyy Long time since I worked on one of those beasts.
Good luck :)