510 BACKROUND: 70 DATSUN 510 with 92' ka24de 5-speed. Been in since 09' has ran like a champ. Harness is a mckinney Pnp unit. Running the ecu off 4-5 wires. Ign, ground power and fuel pump, cant remeber if it has one more.
Issue: Went to store, came out no start.
At home found no fuel pressure.
Replaced fuel pump relay (because i didnt here it click over)
Still no start. I put direct power to fuel pump and the fuel pump came on. At this point the car didnt start. but i confirmed the pump was good.
I checked the fuel pump relay and found PIN 30 should be a ground to the relay... yet its has 12v.
so the ecu controls gounds right....
I want to blame the ecu for not gounding the fuel pump.... but if i power the fuel pump while cranking. i still cant get it started.
tHIS is my DD so any positive help is appreciated.