With engine at idle 13-20 psi
With key on engine off 23-31 psi
7.5 psi
35-45 psi
The spec is 49 psi.
You did not say what year and engine size it was, so I can't tell you the fuel pressure spec's. But I would first check and replace the fuel filter. If that don't make it run then you need to check the fuel pump pressure. YOU probley have low fuel pressure and it has to be a sertine pounds of pressure
60-66 psi
It MUST be 60 to 66 PSI with key on and engine off. NO lower are higher are you will have starting and running problems. It can read 50 LBS. when engine is running.
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.
Yes, it could cause flooding, that's when too much fuel gets into the engine. You need to replace the pressure regulator.
Spec is 39psi plus or minus 5