Injectors get 12 volts anytime key is on. It's the ground to injectors that pcm supplies. Did you install the aldl connecter when you did swap? If yes get an obd 1 scanner and check for codes. The 3 ignition biggies that will shut off fuel injectors, don't light the check engine light. Dtc 16- opti low res pulse missing, also shuts down fuel pump. Dtc 41, & 42, which are icm codes, just shut down injectors.
If vats security system is malfunctioning, fuel enable signal to pcm is cut off, thus killing the injectors. To help you in your search for answers, go to the following link and download the 95 service manual. It has driveability & emissions section with codes, and troubleshooting. Also wiring section with complete wiring diagrams. www.mediafire.com/?40mfgeoe4ctti
Use the 95 service manual to check fuel system wiring, starting on page 8a-21-0. There are 2 injector fuses. Injector wiring is on page 8a-21-3 Both fuse wires run through connector C100, then go though Splice S 101 & S102 before going to injectors.
Fuel pump has a relay that must be activated for pump to run. Find fuel pump wiring on page 8a-21-2 However, there is a fuel pump prime connector that will run pump if 12 volts is hooked to it. It's a gray wire that will be sitting loose and going to nothing.
Relay works like this. Points of relay gets 12 volts from pcm/ign fuse. On Pink wire @ connector C1. Other side of relay points goes to fuel pump. Other part of relay is the coil part. Connector A1 with blk/wht wire goes to ground G103. Other side of coil with connector C2 dark green/wht wire comes from PCM & supplies voltage to relay coil.
When PCM supplies voltage to relay coil, magnetic field occurs and relay points close providing 12 volts to fp. Study the diagram as there are several connectors & splices that wires go through.