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TBatt · 06-23-2016, 07:50 PM

Do any of you know if the fuel pump is a constant run type using a bypass regulator in the pump assembly. I believe it is but not 100% sure.

The reason I'm asking is the pump will run for a couple of seconds when the car is turned on and then it shuts it's self off developing only 20 psi where it should be 50+ psi. It was working fine yesterday but today when I went to start the car after work it took a long time for it to start and then it ran terrible due to the low fuel pressure (very lean). I managed to limp the car home, barely.

I have the CJM fuel gauge installed along with a AFR gauge so this is how I know it is a fuel pressure problem.

06-23-2016, 07:50 PM	#1 (permalink)
TBatt Track Member Join Date: Apr 2013 Location: Huntsville, AL Posts: 832 Drives: 2019 GT-R Rep Power: 20168	Fuel pump question Do any of you know if the fuel pump is a constant run type using a bypass regulator in the pump assembly. I believe it is but not 100% sure. The reason I'm asking is the pump will run for a couple of seconds when the car is turned on and then it shuts it's self off developing only 20 psi where it should be 50+ psi. It was working fine yesterday but today when I went to start the car after work it took a long time for it to start and then it ran terrible due to the low fuel pressure (very lean). I managed to limp the car home, barely. I have the CJM fuel gauge installed along with a AFR gauge so this is how I know it is a fuel pressure problem. __________________ RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE! Last edited by TBatt; 06-24-2016 at 11:16 AM.