remembering that your line pressure must be 43psi + manifold pressure.

so at 1bar of boost, you need to have around 60psi of rail pressure.

50 psi is too low.

[QUOTE=tuna;383401]problems with 3 different fprs, including the stock one.
my money is on the pump still :)[/QUOTE]

Or Pump relay or the connector on to the tank cover.....you can have good voltage but no amperage.

Alright. I'll do another test at 60psi and see how that goes. I'll check the connectors and if need be, Ive got a spare pump from a Bugeye WRX I can try.

resolved?

I did another test at 60psi with the vacuum hose off and got no reduction of fuel pressure on boost. Its pretty safe to say the fuel pump is ok.

Interestingly when I connected a OEM GD FPR. Base pressure was 55psi! Tested it with 2 different guages. One mechanical guage and one electrical guage. These OEM FPRs are not infallible. My Original Legacy one died. 1 dead SARD and another probably dead SARD (Still testing).

Maybe im just shit out of luck? Third time's the charm

Sorry to bring up such an old topic, but did you ever get to the bottom of your problem? i happen to be having the same issues at the moment...