[jspaeth]

Hey all,

I am going to be doing a turbo swap this weekend, and then going to Evans Tuning on Monday to have my car tuned.

This will be on a PFC D-Jetro. From what I understand, fuel injection is controlled via the injector solenoid.....hence, the fuel pressure must be consistent during and after the tune, in order for the proper amount of fuel to be injected when the ECU tells the injector to open a certain amount or whatever.

I just recently installed a Nismo Type-A FPR. I have set it at 34-35 psi at idle, per the FSM. However, sometimes, when I start the car, the pressure is as low as 30 psi or so, and sometimes, it doesn't quite get back up to 35 psi. A few times, I tried raising it back to 34 psi at idle, only to find that when I check the car a half hour later, it is up to 40 psi or so.

I am not sure if this is specific to this FPR, or if the stock FPR also behaves this way.

Can anyone chime in on this? What is the best way to tackle this issue?

....My worries here are

A) Inconsistent FP during tuning
B) (Bigger issue) Random FP drop after tune, causing lean conditions