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Fuel Pump Working But Not Getting Correct Signal

Matty95

By Matty95,
in General Maintenance

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Matty95 Rising Star

Matty95

Posted
Posted

Can anyone help me out, I have a r31 running the stock rb30 and the fuel pump is working but not getting correct signal from ecu, is there a cheap way I can fix this or is it time for a new ecu?

Ben C34 Grand Master

Ben C34

Posted
Posted

So pump works when you apply power directly to it?

I assume you have checked the relay and fuses feeding it.

If you are sure the ecu isn't triggering the relay, wouldn't another r31 ecu be the cheap option of fixing it?

Matty95 Rising Star

Matty95

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Posted

There isn't a relay to it? It's just the fuse then to the pump itself, but after testing the pump itself putting an external source of power and earth to it it pumpe that's why I think the ecu is gone

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Don't tell me you've connected the fuel pump's earth straight into the ECU.. that's probably why it's not working and/or you've fried the ECU's output for the fuel pump.

All fuel pumps go into a relay -> fuse -> power source.

The relay is negativity triggered by the ECU.

How about this, try locating the pin from the ECU harness for the fuel pump and earth it. See if the pump fires.

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