Fuel Pressure
Fuel Pressure Please see video attached.
Key On: No hold in pressure
Engine On: Around 60 psi
Engine with throttle in Park: Around 60 psi
I understand under actual load there might be a good drop in fuel pressure....
No wonder something felt a tiny bit off. I'm assuming the in-pump regulator is bad or something.
Would y'all replace fuel pump?
If so what's a good easy replacement on a 2002 Camaro Z28 with currently an intake, full exhaust, and a 3200 stalled FLT Level 3 for possible future upgrades (Cam) ?
Key On: No hold in pressure
Engine On: Around 60 psi
Engine with throttle in Park: Around 60 psi
I understand under actual load there might be a good drop in fuel pressure....
No wonder something felt a tiny bit off. I'm assuming the in-pump regulator is bad or something.
Would y'all replace fuel pump?
If so what's a good easy replacement on a 2002 Camaro Z28 with currently an intake, full exhaust, and a 3200 stalled FLT Level 3 for possible future upgrades (Cam) ?
Last edited by smokiechicago1988; Sep 15, 2025 at 02:47 AM.
I attached a WOT fuel pressure video.
40 mph cruising: approx 57 psi
WOT: approx 51 psi
Is there any issue with running with a possible bad regulator (assuming it's that) besides not holding pressure with the key in the ON position while engine off ?
Thoughts?
40 mph cruising: approx 57 psi
WOT: approx 51 psi
Is there any issue with running with a possible bad regulator (assuming it's that) besides not holding pressure with the key in the ON position while engine off ?
Thoughts?
Agreed, there's an issue with fuel delivery and/or the FPR cannot regulate the pressure. It should maintain fuel pressure all the way to WOT.
WS6Store has drop in pumps and if your basically stock then I'd go this route on a new fuel pump assembly.
WS6Store has drop in pumps and if your basically stock then I'd go this route on a new fuel pump assembly.
Right, so if my pressure is fine according to the gauge during idle and under load, should I worry that it doesn't hold any pressure during that one instance? The instance of engine off but key in on position as shown in the first video. Basically, if I am getting what seems to be adequate pressure but no regulation / bad check valve or something, should I be worried?
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Joined: Dec 2017
Posts: 1,467
Likes: 265
From: Bossier City, Louisiana
Cycle the IGN key twice to get the pressure and fuel back to the rail before turning the key to start the engine. Or not. This isn't worth doing a lot of work dropping the fuel tank, etc.
Rick
Rick
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