losing fuel pressure on acceleration. lean at wot - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

entrapm3nt · 04-03-2016, 10:43 PM

So recently I reset ignition timing and fixed a idle issue. Since then it is running lean during wot. It goes to around 11 or 12 at first but then goes to 13-14. I always let off if I see it leaning. I checked my aeromotive fpr and when I hit the gas at idle it looses about 5psi fuel pressure. I have a walbro 255 already. A brand new tt z32 fuel filter. Is it possible my fuel pump is faulty or just not good enough? The pump isn't old. My fuel pressure is set pretty high at 50psi. For my set up it might not even be high enough.I know stock is much lower. I'm only boosting 10 lbs atm. I want to turn it up but need to fix this issue. Even with only 10 lbs it feels slow to me. No vac or boost leaks. 165 compression across. Here's a list of mods I have.

sr20det
RS-Empathy rom ecu
mazworx timing chain tensioner
tomei 270/270 pro camshafts
tomei headgasket
tomei rocker arm stoppers
brian crower bc valve springs / retainers
arp headstuds
arp main studs
bored .020 over
wiseco .86.5mm 8:8:1 pistons
eagle rods
greddy oil pan
greddy oil filter relocation kit
greddy front mount intercooler kit
greddy intake manifold
hks ssqv blowoff valve
1000cc five-O injectors
aeromotive fuel pressure regulator
garret GT2871r .86 hotside turbo
Z32 isis mass air flow sensor
isis air intake kit
Z32 fuel filter
Walbro 255 fuel pump

going to test the pump in the next few days but just wanted to see what you guys think.

04-03-2016, 10:43 PM	#1
entrapm3nt Leaky Injector Join Date: Jan 2015 Location: Spartanburg sc Age: 36 Posts: 65 Trader Rating: (0) Feedback Score: 0 reviews	losing fuel pressure on acceleration. lean at wot So recently I reset ignition timing and fixed a idle issue. Since then it is running lean during wot. It goes to around 11 or 12 at first but then goes to 13-14. I always let off if I see it leaning. I checked my aeromotive fpr and when I hit the gas at idle it looses about 5psi fuel pressure. I have a walbro 255 already. A brand new tt z32 fuel filter. Is it possible my fuel pump is faulty or just not good enough? The pump isn't old. My fuel pressure is set pretty high at 50psi. For my set up it might not even be high enough.I know stock is much lower. I'm only boosting 10 lbs atm. I want to turn it up but need to fix this issue. Even with only 10 lbs it feels slow to me. No vac or boost leaks. 165 compression across. Here's a list of mods I have. sr20det RS-Empathy rom ecu mazworx timing chain tensioner tomei 270/270 pro camshafts tomei headgasket tomei rocker arm stoppers brian crower bc valve springs / retainers arp headstuds arp main studs bored .020 over wiseco .86.5mm 8:8:1 pistons eagle rods greddy oil pan greddy oil filter relocation kit greddy front mount intercooler kit greddy intake manifold hks ssqv blowoff valve 1000cc five-O injectors aeromotive fuel pressure regulator garret GT2871r .86 hotside turbo Z32 isis mass air flow sensor isis air intake kit Z32 fuel filter Walbro 255 fuel pump going to test the pump in the next few days but just wanted to see what you guys think.