7.5 psi
1995 and earlier the spec is 39 plus or minus 5 psi. 1996 and later the spec is 49 plus or minus 5 psi.
The spec is 49 psi.
35-45 psi
Possibly inadequate fuel pressure. I forget the Minimum acceptable pressure, but that's easy enough to have checked. It has to have no less then 9 LBS. And no more then 13 LBS. to start and run. You need to take the fuel line loose on the tank side of the filter and install a pressure gauge in the line and cycle the key on and off, That will tell you the fuel pressure. 9 - 13 PSI. is the spec's.
60-66 psi
Check fuel pressure to be sure it's in spec. If it is, then you must check the injectors for pulses.
9 to 13 psi is factory
Check to make sure the fuel pressure reading is in spec. Some vehicles won't run even if they have 30 or 40 psi pressure because the spec is higher.
9 to 13 LBS. No more and no less.
More then likely The fuel pump has quit pumping fuel. Possible cause: Fuel pump relay,Fuel pump fuse, Bad fuel pump stopped up fuel filter, Not enough fuel pressure. If it's fuel injected then it should be no lower are higher then the factory FUEL PRESSURE SPEC'S. It would help alot to know what you are working on. Year, engine size and what it is. Does it have fuel in it, for SURE ? Check fuel pressure with fuel gauge. Very important to check with a GAUGE.
Spec is 39psi plus or minus 5