Hello everyone, I am pulling my hair out trying to fix this issue and I am hoping someone can help me.

I have a J35A4 in my off road car using a mill spec PJ’s customs wiring harness and a AEM series 2 ECU.

Everything was working great till I decided to rewire the car. As soon as I flip the main power switch to the car the fuel pump relay (MSD solid state relay) is being triggered by the ECU. As soon as I turn the ignition key to on the fuel pump stops. It will then prime when cranking and run once the engine starts.

As soon as you turn the car off, the pump will continue to run.

When I redid the wiring I lost the wire tags from the ECU. I did get the pin out from the harness builder and it’s correct based on his diagram.

I thought my ecu might have gone bad so I shipped it to FF chips and they tested it and it passed with no issues.

I am at a loss. Anyone have any idea?? Please help. I am desperate.