What'* the chance I bought a defective FPR?
In April, I bought and installed a new fuel pressure regulator as the car had difficulty starting. Prior to the change, the pressure was around 37 PSI at idle and 42 PSI with the vaccuum line disconnected. After the change though this went down to 30 at idle and 37 without vaccuum line. Although these numbers are a bit lower than the manual shows(40-47 PSI), the car started and ran very well and held pressure for over an hour after shutdown. Well, I'm having difficulty starting again.
Testing procedures in the manual include removing the FPR and installing a test valve of some sort to see if the pressure is being lost in the feed line rather than the return line. I'm not lucky enough to have this valve so I was wondering if it is likely that I have a bad FPR again or if the fuel pump is a better suspect.