BadgeZ28

iTrader: (28)

I just installed a electric fuel pressure gauge and have been watching it just cruising around. My supercharger is off the car for some mods, so no full throttle action. I am seeing pressures fluctuate between low 50's to low 60's. I have it in my head that a pump should provide a constant set pressure. What are you seeing as far as fuel pressure as you drive around? Thanks

EPP

iTrader: (22)

Do you have a boost referenced fuel pressure regulator? Bob

98Camarod

iTrader: (43)

I do, hence why I see a constant 58 psi.

It sounds like you don't. But I don't recall mine varying that much. It only varied that much on WOT runs, it would drop a few psi.

theblur98ss

iTrader: (71)

Something doesn't sound right. 10psi is a big difference even if is referenced and you're staying out of boost. What is the rest of your fuel setup?

BadgeZ28

iTrader: (28)

255 ltr pump, 42Lb green tops, and tune is all that has been done to the fuel system.

badass99ss

iTrader: (17)

Mine stays rock steady until I get on it, but even then it only drops a few PSI if any.


Troy

BadgeZ28

iTrader: (28)

Sounds like I have work to do. Thanks guys. It was worth asking.

cjg454ss

iTrader: (27)

mine does that sometimes, ill start the car and it will be 60psi, shut it off and it may be the same, sometimes it goes to 55psi and stays their. i dont get it, maybe a regulator issue. i have a dual walbro setup.

BadgeZ28

iTrader: (28)

I did a bit of reading and the in tank pick-up assembly has a built in regulator. I have a second Walbro setup, so might swap that in. I had some grounding issues to get the gauge reading, so will play with that a bit first.

allthrotle

iTrader: (2)

Im running the racetronix pump with harness and 60lb injectors. My pressure stays at 60psi and might drop a couple psi under boost.

Jimmy P

iTrader: (177)

That is a big fluctuation to be just driving around. I would look over the entire fuel system. Have you monitored your voltage at all? When I had voltage issues in the past, the fuel pressure would drop as soon as voltage dropped. Also, try to make sure that it isn't just a bad gauge/bad sending unit.