Fuel System Operating Modes

The fuel tank stores fuel supply. A mechanical fuel injection pump, located below engine intake, draws fuel through the fuel injector control module and fuel filter. The fuel is used as a coolant for the fuel injector control module. Fuel pump output is controlled by the ECM and provides fuel at the pressure needed by the fuel injectors. Fuel injectors supply fuel directly to the engine combustion chambers. A separate pipe returns unused fuel through a fuel cooler and to fuel tank.