Ever since upgrade from my stock 92 Si Fuel pump to a 255lph Walboro unit my fuel pressure has been dangerously high(55-60psi at idle) and my FPR will not bring it down any lower! I have also tried the FPR trick on the Endyne website to help relieve more pressure from the system, still staying strong between 55-60 psi! So I am wondering:

1. Should I go back to the stock OEM fuel pump?

2.What size fuel pump is the OEM unit for a 92-95 Civic Si HB(D16Z6 original motor)?


Here is my setup if this helps:

EG Civic HB
B18A Block/ B18B Head
-Mild PnP
-Crower 404 w/ JG Cam Gears
-Crower Valvesprings
-Ferrea SS Valves
-Cometic Head Gasket
-Skunk2 Mani
-64mm TB
-Modified Iceman intake
-JDM ITR 4-1 header w/ 2.5" collector
-No Cat
-2.5" custom piping and exhaust
-P30 B16 Pistons
-Stock Rods
-GSR Tranny w/ LSD
-Exedy Flywheel
-Clutch Specialties 6-puck clutch
-H22 injectors
-Walboro 255lph fuel pump
-SAFC2
-Chipped P75