1991 Pontiac Grand Prix 91 GP 3.1 No Injector Pulse

Hi, my father in law bought this car. It had been sitting for a year or so...driven maybe once a month. After buying the car it ran for two days then died and will only start once in a great while. It will start with starting fluid and it has fuel pressure. I had the ignition module tested at O'Riely's and it tested good. I have read some posts about similar problems, but have not read many solutions. I have tried 3 different ECM's....all used though...but no luck.

If anyone can provide me with the pinouts of the four ecm plugs so I can make sure it is getting voltage that would be great. I have not tested the injection pulse with a noid light because we don't have an Autozone in town to borrow the noid light.

I am trying to troubleshoot as much as I can without removing the plenum to test each injector for a short.

Thanks in advance for any and all advice!