Fuel System Description: Notes
- Fuel Filter Assembly
- B47 Fuel Pressure Sensor
- B47B Fuel Rail Pressure Sensor
- Q18B Fuel Pressure Regulator 2
- Q17 Fuel Injector
- G18 High Pressure Fuel Pump
- Q18A Fuel Pressure Regulator 1
- Q18C Fuel Pressure Regulator 3
- E12 Glow Plug
- K20 Engine Control Module
- A7 Fuel Pump and Level Sensor Assembly
- Fuel Cooler
The primary fuel tank stores the fuel supply. The primary fuel tank contains a 3 - phase electric fuel pump that is controlled by the fuel pump driver control module and engine control module. Fuel is pumped from the primary fuel tank through the fuel feed line to the fuel filter assembly. The fuel filter assembly consists of a fuel filter/water separator, fuel heater, fuel temperature sensor, and a water in fuel sensor. Fuel flows out of the fuel filter assembly through the rear fuel feed pipe and past the fuel pressure sensor to the high pressure fuel pump. High pressure fuel is supplied through the high pressure fuel line to the fuel rail and then through the fuel injector lines to the fuel injectors. High pressure fuel is controlled by the ECM, fuel pressure regulators 1, 2, and 3. Excess fuel returns to the fuel tank through the fuel return pipes.