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The fuel pump pressure is what allows the fuel to flow to the engine. It determines how much goes in and also when.
which engine? diesel or gas? for efi use fuel pressure gauge and adaptor at the fuel rail, more than likely the driver side of engine
2.8 to 3.6 psi.
Fuel pump pressure (Maximum) 75 psi
With a fuel pressure gauge. Not knowing what year and engine you have I can't tell you what the pressure should be.
In most vehicles you can remove the fuel pump fuse or fuel pump relay as the engine is running, the engine will stall when the pressure is gone.
Remove the fuel pump and relieve the fuel system pressure. Disconnect the fuel line then fix the fuel pressure gauge. Reconnect the fuse to the fuel pump and start the engine to check leakage. Tidy the surrounding of the fuel pressure regulator.
The fuel pump pressure may vary by vehicle. However, on average the fuel pump pressure with the engine running should be between 4-6 psig.
Remove the fuel pump fuse or relay while the engine is running. When pressure is depleted the engine will stall.
Fuel pressure regulator, or a stuck relay.
i In the gas tank attatched to the fuel pump. There is also a fuel pressure damper up in the engine on the fuel line as it goes into the injection system.
Your engine does not really have an injector pump. It has a fuel pump that feeds the fuel filter and then into the fuel rails. The pressure oil pump increces the fuel pressure in the injector and the enjector is opened electricly. This is a very simple way of telling you how it works. The height pressure oil pump is located at the front of the engine under the fuel filter just below the oil tank.