Basic System Operation

The fuel supply is stored in the fuel tank. The fuel sender allows retrieval of fuel from the tank and also provides information on fuel level. An electric fuel pump contained in the modular fuel sender pumps fuel through the fuel pipe and the fuel filter to the fuel rail. The pump is designed to provide fuel at a pressure above the regulated pressure needed by the injectors.

The fuel system in this vehicle is recirculating; this means that excess fuel that is not injected into the cylinders is sent back to the fuel tank by a separate fuel pipe. This removes air and vapors from the fuel as well as keeping the fuel cool during hot weather operation.

For further information, refer to Fuel Supply Component Description for replacement procedures covering the fuel tank, fuel pump, fuel filter, and fuel pipes.