Fuel System Operating Modes
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
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.