High-Pressure Fuel Injection Pump
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
| Item | Description |
|---|---|
| 1 | High-pressure fuel rail supply fitting |
| 2 | Fuel return outlet port |
| 3 | Fuel supply inlet port |
| 4 | Fuel volume control valve (serviced separately or with the injection pump assembly) |
| 5 | High-pressure fuel rail supply fitting |
The high-pressure fuel injection pump supply tube supplies fuel from the secondary fuel filter to the high-pressure fuel injection pump.
The fuel pressure control valve bleeds off excess fuel rail pressure.
The fuel volume control valve controls the volume of fuel entering the 2 cylinders of the injection pump.
The high-pressure fuel rails distribute fuel to each of the injectors via individual steel injector supply tubes.
The PCM uses the fuel rail pressure sensor to determine the actual fuel rail pressure.
The PCM controls the duty cycle of the volume control valve and the fuel pressure control valve to maintain fuel rail pressure.
The fuel injector sprays high-pressure fuel into the combustion chamber.