u/Beneficial-Newt-6436

My 1990 NA has been running fine for many years. The last time I went for a ride, on the way home, I experienced a slight missfire or hesitation under moderate to heavy load but it was OK driving normally. I parked in the garage and 2 dys later decided to look for the problem. I would not start. I found that there was NO fuel pressure. Replaced the fuel pump. now the car starts immediately but quits when the key is released. I also have a 93 z32 concertible and swapped the CAS, PTU. fuel pump relay. I bypassed the fuel pump contrrol module although I have 35psi fuel pressure when it quits. Does anyone have any idea where to look next?