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What is stock fuel pressure supposed to be? At idle and WOT.
My idle pressure was reading a solid 50psi. I didnt get to go WOT before i was having problems with the schraeder leaking.
Our rail pressure is supposed to be 42.5 IIRC. Although it varies from vehicle to vehicle. Mine at idle seems to be right at 40 or so; maybe a bit higher. I think you'd probably be fine with 50 psi, so long as you maintain that as you accelerate. I usually only hit 50 or a bit higher at WOT. Maybe your pump is an overachiever. Lol.
After my Walbro 255 install my PSI reads 48-50 PSI and now 7 years later about 46-48 PSI , might move up to 52 PSI at WOT but thats fine.
08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine
hmm...Ive had spikes up to 60/70 at idle, and had it sit there. Most of the time I idle at around 40-50, and at WOT I am at almost 70... this is with a stock fuel pump.
hmm...Ive had spikes up to 60/70 at idle, and had it sit there. Most of the time I idle at around 40-50, and at WOT I am at almost 70... this is with a stock fuel pump.
If thats the stock pump and you don't have a aftermarket FPR then your FPR might be going out on ya. I 've only seen mine that high with a FMU and running boost.
08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine
If you get too much you'll run rich all the time and even flood out the plugs , I would check your vac. line on the FPR on the fuel rail. You could have something in the sender unit making it read higher too , so thats something to look at, I would think you would be having alot of problems if running 70 PSI N/A , stock says 45 idle and 55 at WOT , give or take some PSI. Whats your VAC. at , mines at -16 with my VS cam at idle and about -20 if i go 55 MPH and let off the gas. Stock I think is -18 and -22.
08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine
Copied from the Techinical Database link at the top. Dur. So it's 4 bar like an LS1 car.
Thats where I saw it , also in my Haynes manual I can't find.
08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine
If you get too much you'll run rich all the time and even flood out the plugs , I would check your vac. line on the FPR on the fuel rail. You could have something in the sender unit making it read higher too , so thats something to look at, I would think you would be having alot of problems if running 70 PSI N/A , stock says 45 idle and 55 at WOT , give or take some PSI. Whats your VAC. at , mines at -16 with my VS cam at idle and about -20 if i go 55 MPH and let off the gas. Stock I think is -18 and -22.
its only spiked up there a couple times, most of the time its around 40-50 at idle...not sure what caused the spikes.
No idea what my vac is, never tested it, and I dont have a tester for it.
I would think that my tune would take care of being rich all the time...mind you this could explain why I am at 2-3% cylinder fill on some of the low vacuum columns in some of my VE cells
Haven’t done anything on the Camaro, but put LEDs on my truck headlights . And my oil pressure sensor went out on the truck so going to fix that this...
Haven’t done anything on the Camaro, but put LEDs on my truck headlights . And my oil pressure sensor went out on the truck so going to fix that this...
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