s14 sr fuel problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jp-racing · 03-09-2010, 04:06 PM

i got my FPR at 3.5 bar and when i take off in first and hit the gas and go over 3000 rpm bough down but then it works fine, if i got to second gear it runs fine + if i put the volume up on my sound system you can see the FP gauge jump from 3.5 to 3.0. I think is my FPR but i want to know what your think

jspaeth · 03-09-2010, 04:14 PM

Quote:

Originally Posted by jp-racing

i got my FPR at 3.5 bar and when i take off in first and hit the gas and go over 3000 rpm bough down but then it works fine, if i got to second gear it runs fine + if i put the volume up on my sound system you can see the FP gauge jump from 3.5 to 3.0. I think is my FPR but i want to know what your think

2 Problems here:

1) Your fuel pressure for a stock SR should be exactly 3 bar with the vacuum line pulled off.

...with the vacuum line on, it should be roughly around 34-35-36 psi.

So why is your base fuel pressure so high?...is this an OEM FPR? If so, then it needs to be replaced.

2) It should be VERY clear to you that if you turn you radio on and the fuel pressure goes down, that there is an electrical issue.

More likely than not, the wiring to the fuel pump needs to be redone and placed on a circuit that is not effected by the stereo system.

jp-racing · 03-09-2010, 04:52 PM

i got an after market FPR w/a Walbro 255 fuel pump and if there any way i can get the wiring diagram to rewire the fuel pump?

jp-racing · 03-09-2010, 05:11 PM

Quote:

Originally Posted by jspaeth

2 Problems here:

1) Your fuel pressure for a stock SR should be exactly 3 bar with the vacuum line pulled off.

...with the vacuum line on, it should be roughly around 34-35-36 psi.

So why is your base fuel pressure so high?...is this an OEM FPR? If so, then it needs to be replaced.

2) It should be VERY clear to you that if you turn you radio on and the fuel pressure goes down, that there is an electrical issue.

More likely than not, the wiring to the fuel pump needs to be redone and placed on a circuit that is not effected by the stereo system.

my sr is no stock
i got a top mount t66 turbo,z32 maf,255 Walbro fuel pump,megan 3'' exhaust,Greedy IC,Greedy Intake Manifold,Emance tune ecu, 18PSI on boost, Methanol Injection not install yet, koyo rad,elec fans.. I want to thanks in advance for the help

03-09-2010, 04:06 PM	#1
jp-racing Join Date: Feb 2009 Location: Perth Amboy,NJ Age: 38 Posts: 46 Trader Rating: (0) Feedback Score: 0 reviews	s14 sr fuel problem i got my FPR at 3.5 bar and when i take off in first and hit the gas and go over 3000 rpm bough down but then it works fine, if i got to second gear it runs fine + if i put the volume up on my sound system you can see the FP gauge jump from 3.5 to 3.0. I think is my FPR but i want to know what your think

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03-09-2010, 04:52 PM	#3
jp-racing Join Date: Feb 2009 Location: Perth Amboy,NJ Age: 38 Posts: 46 Trader Rating: (0) Feedback Score: 0 reviews	i got an after market FPR w/a Walbro 255 fuel pump and if there any way i can get the wiring diagram to rewire the fuel pump?