Im having a problem with my fuel pressure being really low. I need to know what the non adjustable regulator that comes with the HSR is set at for psi. Right now its reading around 35 psi, and we werent sure if thats where they were supposed to be set at or if they came more like 43.5 psi. Just need to determine if an AFPR will fix the problem or if its the old stocker fuel pump that is giving the low pressure and needs replaced

 

Is the vacuum line connected? Max pressure occurs with it disconnected.

I'm not 100% sure where mine is, but 35 psi with vacuum doesn't seem to bad to me.

 

mine actually fluctuates between 35-38ish depending on if im getting on the gas or not. i was just curious if thats where it was set at normally or if the fuel pump was bad . right now im having a lean condition through all rpms so we need to tune around it, but didnt wanna do it before knowing if the reg or pump was bad

 

yes vacuum line is connected, i have 24lb/hr injectors and the car is leaning out so its trying to add more fuel but cant right now. My friend is doing the chip burning, but didnt wanna make changes til he knew if the reg was right or not.

 

Disconnect the vacuum line - if you are at or around 43, then the regulator is probably OK.

 

I'm having similar issues with my holley non-adjustable FPR. 30# SVO injectors, the chip injector constants are down to 24.00 and I'm still running at 150-160 BLM's. I can't even read the pressure because of the cheap piece of crap shraeder valve. I'm thinking an AFPR not from holley may fix this.