1991 Pontiac Grand Prix GTP
I can't get the car started, It all started when after the car sitting for just short of a year I went out (freezing cold) and plugged in the car, installed the battery and after a couple hours started the car drove it 15 kms, stopped and got fuel started the car up and drove another 35kms, with no problems, then I let the car sit for 3 days unplugged in the extreme cold, went to try to start it with no success so I plugged the car back in for a couple of hours boosted the car (started it) pulled it into the driveway left it idling to warm up and approx 10 minutes later the car stalled and won't start again. So I've tried everything, checked all the fuses, installed a new crank sensor, new modulator, new coils, new fuel filter, did all the tests on a top of the line scanner everything reads fine, did the fuel injectors test they are opening and closing, tested spark everywhere and have spark, have fuel from pump, even checked the timing belt and it's all lined up perfectly. I'm at my wits end. Is there something I've missed?
Any idea's would be welcome.
Thanks;
Scratching my head Greg