Originally Posted by wcbjr
FPR is AFTER the injectors/rails. AFTER.
The pump flows fuel from the tank to the FPR. The pressure is maintained from the pump to the FPR, in between which sit the injectors. Any excess pressure over what the FPR is set for is relieved into the return line which goes back to the tank.
I just wanted to reclarify what has already been said.
Reg gets fuel after rails before tank return to clarify. Sorry for confusing you all. I just finished some fuel system removal on an sti and figured to mess around on the forum a bit. didnt mean to cause a mess. I have sti fuel parts for sale in the private fs forum if anybody would like some low mileage stuff.