Power Fc Help

[britz1]

ok i recently installed a Fuel Reg and pump on my mates supra...

its fine if we leave the fuel pressura at 34 psi but when i turn up the pressure to 40 even 50 the pressure just dies in the ass until it goes to 0....

im thinking its because his car has a ramping fuel pump signal from the ecu. and when i turn up the pressure the load on the pump is to great for the amount of voltage the ecu is giving it and it stalls...

my question is can you turn up the amount of voltage that the power fc is giving the fuel pump....

if no can i just run a hard feed to it from the ignition and hav it running all the time the engine is on at full speed?

any help would be awesome cheers

[The Dan]

You have to be very careful running a constant power feed to the fuel pump. The system is designed to be switched on by the ECU for safety reasons.

If the car is in an accident, the fuel pump will continue to pump fuel if you don't have it switching off the pump via the ECU or oil pressure switch etc.

~35psi is normal operating pressure, so with a different rising rate reg, you will be injecting more fuel when you need it anyway.

Are you setting the pressure with the VAC line disconnected from the reg?

[Beer Baron]

power FC just runs the fuel pump at constant voltage. at least it does in Nissans.

[britz1]

You have to be very careful running a constant power feed to the fuel pump. The system is designed to be switched on by the ECU for safety reasons.

If the car is in an accident, the fuel pump will continue to pump fuel if you don't have it switching off the pump via the ECU or oil pressure switch etc.

~35psi is normal operating pressure, so with a different rising rate reg, you will be injecting more fuel when you need it anyway.

Are you setting the pressure with the VAC line disconnected from the reg?

yer mate i know how to set the pressure correctly... his car is leaning out under high revs and we cant reduce the boost because with the highflow cats it runs at 18 psi minimum... so we were just gonna raise the injector pressure to get that little bit more flow so the engine dosent ping off its face....

is a relay an option to ilimanate the gradual voltage increce?