86 PONTIAC GRAND AM DIES AFTER ITS WARMED UP.

Can anybody help me??? The car was given to me, while driving the car it died, then it wouldn't start back. Had it towed, and the next morning the car started right up. Then driving again it died again, wouldn't start again, towed again, started again. Whats up with that??? Started to check for problem, noticed vehicle still had spark. Also vehicle had fuel pressure, when the vehicle did run, I checked for proper fuel pressure and it was in specs. But the catch is, I noticed injectors losing signal pulse when it won't start back up. Everything else seems to be satisfactory. Any input??????