I have a 1995 Pontiac Trans AM with 13000 miles on it. I just recently bought it. It had been sitting for over a year, It does start and run, though not like a LT 1 should. Some times it won't start sometimes it does then it will quite on me after i drive it for awhile. I have replaced battery, mass air flow sensor, spark plugs, throttle position sensor, fuel cap, PCV valve, fuel filter, and taken out a restricitve muffler that was in place of the cat's. I have checked the altanator which is working proberly. I have tried numerous code reader's, It is a 16 pin which doesn't work with 95 and prior and 96 through present doesn't have on program Any ideas?