A 95 should have the standard OBD2 connector under the dash on the drivers side, assuming it wasnt moved or eliminated during the swap. Even though they are still OBD1, Honda was ahead of the game in crossing over, and had OBD2 connectors since 94. Again, assuming the swap was done correctly and not converted to OBD1, you should still be able to pull codes from there.
If the fuel pump is not shutting off, it has nothing to do with an injector sticking. It is supposed to prime the system when the key is turned on, and then shut off once prime is reached if the car is not started. Most likely guess would be the relay itself is no good. But your best bet would be to trace the schematic and test whatever is controlling the pump. It may be driven straight from the ECU, i forget...