1G No Control Signal To Fuel Pump

[Chumpaumpalumpa]

Hello everyone I have a 1990 Eagle Talon Tsi AWD and heres the isuue. The MPI control relay is good because when i ground the control pin from the ecm/MPI control unit (wht-red wire) the fuel pump turns on and runs fine. Can a failed (oil pressure?) sensor prevent the fuel pump from running? Also, when i turn the key on the fuel pump does not run even for a second. Please help this is my DD!!

 

[pauleyman]

No it can't. Fuel pump does not run with key on. Only while cranking from cas signal and of course after it starts because cas signal is still feeding

 

[Chumpaumpalumpa]

What it looks like is the ECU isn't getting a ground to send a signal to the pump to turn it on...... Any ideas on what might be the issue besides the ECU? I know the pump works because I can hotwire it and it runs but turning the key does nothing...... Sending a signal from the MPI control relay turns the pump on via the relay for the re-wire.

 

[pauleyman]

The engine must be cranking. Youre not being clear here. What are you doing? Chasing a no start?

 

[Chumpaumpalumpa]

I didn't know the cas handles the fuel pump relay........ When cranking I hear the relay clicking on n off I'm gunna wire it back up n see if it runs thanks a lot for the info

 

[Chumpaumpalumpa]

it works great thanks