12:1 FMU on '95, do I need to unhook stock FPR?

[MiztahFooLish]

Just like the subject states, I recently installed a custom stage 2 on my 95 RS but I'm getting too high of a fuel pressure (70psi @ idle). When installing an FMU do I need to unhook the vacuum hose from the stock FPR on the fuel rail and just cap it. All the vacuum lines have been replaced and the only ones I can think of causing the vacuum leak problem is the stock FPR still hooked up to the vacuum and my 60mm Jeep TB that I had since I was running all motor. Any assistance would be appreciated. Thanks.

 

[eclipsers-t]

I have the Hahn kit and with the FMU sent the stock FPR is unhooked. I just left mine open without caping it off.

I lost a vacuum line one night and we were trying to figure out where it went, because the car was running bad, we hooked it up to the stock FPR and it still ran bad. I think it pulls too much fuel when it is capped off.

 

[VelocitàPaola]

Nope... you leave the stock FPR connected in conjunction with an FMU. You only disable the stock FPR with an AFPR that can control vacuum and idle fuel pressures (i.e. Aeromotive 1:1, S-FMU, etc.).