FD3S Fuel Voltage Low, Resistor

[cewrx7r1]

Originally Posted by ZGN

I have been reading on fd3s.net about this:

Low speed is active at idle and under 3K rpms through the fuel pump resistor fed through the main relay. High speed runs through the fuel pump relay which the ecu controls; the fuel pump relay supplies battery voltage to the pump when it is closed. The ecu toggles this relay so the ecu actually controls the fuel pump speeds.

Does the PowerFC have a setting that can control this?
What other fuel pump relay are they referring to ? is it the relay Mounted on Left Inner Fender in the wide Relay Box

Look in the FSM and you will see the circuit opening relay which supplies the 12V to the pump(located in the left fender box) and the speed relay(located in the front box).The PFC handle them as the stock ecu does.

I rewired mine to run exactly like stock buy installing a chassis ground near the pump, and some parallel wires. This increased the votage to the pump from 11.8 to 13.8.

[RICE RACING]

Re wire it mate,

I have a Sard 280lt DENSO pump with rewire and BOOST A PUMP in mine and its perfect.