1994 Cobra Fuel Pump constantly priming/ running.

[95 mustang gt 5.0]

Hey guys okay so I have a 1994 cobra 5.0 with a on3 turbo kit. I recently took out the engine rebuilt it all, took out the main engine harness and fuel injector harness. Put it all back in and now when I connect the battery terminals, as soon as I connect the positive, the fuel pump immediately starts to prime. I also noticed the CCRM box started to smoke a little bit. I took it out and swapped it out with another one but it also began to smoke a little. Battery is relocated to trunk and I have both positive and negative 0/1 gauge wire running from the trunk to up front. I have a ground in the trunk as well. I kept all the old grounds up front and connected the engine to chassis ground and the negative cable front the battery at a junction post (I’ll provide pictures). For the positive side I kept it all the same as well and just have the positive cable at a junction post with the two positives that where connected to the battery positive terminal prior to me relocating it to the trunk. When I disconnect the CCRM the fuel pump stops priming. Also having troubles with the car not wanting to crank.

 

[revhead347]

Take car battery out of trunk, and hook it up where it's supposed to go and see if that fixes it.

Kurt

 

[95 mustang gt 5.0]

Take car battery out of trunk, and hook it up where it's supposed to go and see if that fixes it.

Kurt

Thank you for the advice, I tried it out and nothing, I ended up figuring out the no crank, it was a wire from the clutch pedal switch, fuel pump problem is still there and i am currently getting no spark. I’m gonna pick up a new ignition control module and see if that helps my no spark.

 

[Mustang5L5]

On the fox cars, a fuel pump continuously priming before starting indiciates an issue with the ECU.

 

[95 mustang gt 5.0]

On the fox cars, a fuel pump continuously priming before starting indiciates an issue with the ECU.

Currently the situation is the car will only start with the spout disconnected and with starting fluid. I ordered a new computer but crossing my fingers it’s that.

 

[Mustang5L5]

Can you dump codes? That would give you an indication of the state of the ECU.

 

[jozsefsz]

Since you have a turbo kit, you likely have a chip. If that has lost its memory (an old Quarterhorse where the battery went dead?) or become dislodged, you'll have all kinds of problems. The fuel pump running constantly is one of them. Worth a look before swapping ecu.