low fuel pressure issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Ahut2000 · 04-03-2011, 07:08 AM

Quote:

Originally Posted by JDMRIDDAZ

THE 11v to fuel pump is issue
rewire it with heavy duty wire a relay and allow power to come from battery
why is the pump external...
is the other pump in fuel tank?

it's an 83 maxima, always had an external pump. I will try a bigger wire. I am using a new fuel pump relay with a 12 gauge wire but I can try a 10

JDMRIDDAZ · 04-03-2011, 08:29 AM

Quote:

Originally Posted by Ahut2000

it's an 83 maxima, always had an external pump. I will try a bigger wire. I am using a new fuel pump relay with a 12 gauge wire but I can try a 10

oh ok wat i meant tho is to rewire it outside of factory wire
to insure it gets full voltage

Ahut2000 · 04-03-2011, 02:18 PM

I rewired the fuel pump today and now i'm getting 12.1V at idle instead of 11.7V but it hasn't fixed the problem. I dunno how to check while the car is under load... haha. I just have a multimeter.

This didn't do jack though... the car is idling at 30psi and stock it's supposed to be 38psi. The FPR is functioning properly. I guess I'm going to try the pump from my other car on this one... I really can't think of anything else.

The rail holds pressure when the car is turned off so i don't think it's the fpr or the injectors but not sure..

04-03-2011, 02:18 PM	#3
Ahut2000 Zilvia Member Join Date: Jul 2008 Location: GA Age: 39 Posts: 181 Trader Rating: (0) Feedback Score: 0 reviews	I rewired the fuel pump today and now i'm getting 12.1V at idle instead of 11.7V but it hasn't fixed the problem. I dunno how to check while the car is under load... haha. I just have a multimeter. This didn't do jack though... the car is idling at 30psi and stock it's supposed to be 38psi. The FPR is functioning properly. I guess I'm going to try the pump from my other car on this one... I really can't think of anything else. The rail holds pressure when the car is turned off so i don't think it's the fpr or the injectors but not sure..