94 buick regal starts dies after 2 seconds?

[xNGxCRASH]

ok ive replace the icm and cps has 12 volts at icm hard wired fuel pump got lots of pressure still died tried starting fluid still dies no vac leaks unpluged mass air flow no help ok i turn the key on and try to start runs 2 seconds and dies i hear the pump re prime without turning off the key try again starts 2 seconds then dies. last summer if the car got hot and i shut it down it wouldnt start for ~30 mins then would run perfect but heres the wierd thing when it starts for 2 seconds and dies the service engine light goes out and dosent come back on?? im replacing the ecu pcm whatever you call it on a buick (computer) can someone please help as my car is 15 miles away lol and my truck gets 7 mpg it sucks going over there to work on it monday im getting a car dolley