Fuel Elevated fuel pressure.

[rockyracoon]

Ladies and gents
Can someone tell me if a fuel pressure reading of 37 psi with the vac line connected is high and if so could that cause loss of power ?

 

[General karthief]

Marginally high but would not cause a loss in power I would think.

 

[7991LXnSHO]

What does it read with the line unhooked? That’s the only way I can get a steady reading at idle, and is how we are supposed to be setting it.

 

[rockyracoon]

Mine reads 37 hooked and 41 line off.

 

[7991LXnSHO]

Unless you need extra fuel, it sounds a little high. The drop when idling is a sign the FPR is working.

This thread might help.

Fuel Pressure Regulator Help

Alright guys I've been searching the internet for two days now with no luck, so to keep me from banging my head on my desk im hoping someone here can chime in and help me out. So I have a 91 fox with ERG delete- BBK 70mm throttle body- Trickflow Track Heat Intake - RPM Performer Heads-...

www.stangnet.com

 

[Blown88GT]

Mine reads 37 hooked and 41 line off.

That's within the normal range.
It can be higher if you have a 255 lph or higher fuel pump & the factory stock fuel lines & FPR.