1988 Chevy Cavalier won't start

I have an 1988 cavy Z 24, It has over 247,000 miles.
this car has not been driven much in the last 3 years.
A few months ago I started the car, left run for 1/2 hr or so then went to drive it and it died.I could'nt get it to restart. The following weekend it started right up, so I left it run for 20 min. It died and would'nt restart. Knowing the gas was old I drained the tank, and replaced the fuel filter. I got the same results the next weekend. This weekend it won't start at all.I borrowed a pressure gage to check the fuel pump Gas flows nicely with line disconected and I have 41psi at the fuel rail. I removed the coil packs and control module took them to AutoZone for testing, one of the coil packs was a bad [secondairy was open] The rest tested fine. After replacing coil packs and control mod. It still won't start. I have check for spark with both an tester and grounding a spark plug. I have double checked the wire harness connections [make sure I plugged them back in, also if anything else was unplugged, and the only code I get from the computer is 12. Although I don't drive this car daily { I have a company car] I'm not allowed to drive company car for pleasure trips. And this problem is testing me.