R33 Gts-T S2 Fuel Pump Problem

[lareee]

Hi!

I'm having issues with my fuel pump. The pump does not prime when turning the ignition on. Pump and relay are ok. Relay harness is getting solid +12V all the time.

I'm really confused with all the FPCM and ECU related stuff. How is the system designed to work? What kind of readings am i supposed to get from the ECU pin 18? Now I'm getting constant +12V when ignition is on...

Only way i'm getting the pump to prime is by grounding the black/pink wire from relay to ECU pin 18. This way I can get the car started, but it dies immediately after I take the wire off from the grounding point.

It is hard to try to solve this problem, because I have no idea how the system is supposed to work... :confused:

Are there any relays or fuses apart from the ones in the boot that should be checked?

What is there to do? Is hardwiring the pump going to be a solution?

THANK YOU FOR YOUR HELP!

-Lars

[SkudR33]

Hi!

I'm having issues with my fuel pump. The pump does not prime when turning the ignition on. Pump and relay are ok. Relay harness is getting solid +12V all the time.

I'm really confused with all the FPCM and ECU related stuff. How is the system designed to work? What kind of readings am i supposed to get from the ECU pin 18? Now I'm getting constant +12V when ignition is on...

Only way i'm getting the pump to prime is by grounding the black/pink wire from relay to ECU pin 18. This way I can get the car started, but it dies immediately after I take the wire off from the grounding point.

It is hard to try to solve this problem, because I have no idea how the system is supposed to work... :confused:

Are there any relays or fuses apart from the ones in the boot that should be checked?

What is there to do? Is hardwiring the pump going to be a solution?

THANK YOU FOR YOUR HELP!

-Lars

Unplug the harness going into the fuel lump in your boot and test it with a multimeter. When you click the accessories on one of the pins should get power for the first few seconds ... If it's getting power means your pump or wiring in the petrol tank are screwed.

Let us know how you go!

[Dose Pipe Sutututu]

Maybe your stock resistor has died, just ground off the fuel pump from the lid harness.