Honda Del Sol Si no start (Fuel Pump not priming)
I've recently been repairing my 93 Del Sol to get it to run again. In the past its always had weird starting issues that have disappeared and come back multiple times. In the past changing the battery and installing a new fuel pump have "fixed" these issues, but obviously they reappear.
This most recent stint of repair involved an actual mechanic installing a new fuel pump, distributor, and head gasket. After the repairs I was able to start the car and drive it home. However, at the time of driving I believe I had the P28-A02 ecu in the car (Still allowed my manual to run and drive). Once I got it home I drove it once more, and after the car could turn over but not start, the CEL light stays on but the fuel pump does not prime.
Test/fixes I've done:
I've cleaned the g101 ground wire and ground wire for the battery. I also switched out the ECU with another one. The car then started after also jumping the car, with the fuel pump seeming to prime louder than before. I then disconnected the car, was able to start it again. Afterwards the car would not start with no fuel pump prime and the CEL light staying on. I switched out the other ECUs (I have 3 ECUs, all P28s) and the car would still not start, no fuel pump prime and the CEL light staying on
I have made the fuel pump prime by jumping the either the 1-7 or 1-5 connection on the main relay (Cant remember which one)
I also voltage and current tested the battery to see if there was any parasitic draw. The battery reads 11.8V (should be 12.4V-12.6V) and there is no apparent parasitic draw as the current reads 0.
Fuse 24 and 31 have been tested with a multimeter, with both reading 0 resistance.
I also tested for spark and there is spark coming through the spark plug wires.
If there are any directions I should go in to diagnose the problem any are appreciated. These phantom no start issues are frustrating.