Fuel Pump: Description and Operation

Fuel Pump:

The fuel pump is an electric pump that is controlled by the PCM through the fuel pump relay. When the PCM commands the fuel pump on, an electric motor in the pump assembly drives the impeller. The impeller draws the fuel in the tank into the fuel pump inlet port. The fuel is pumped under pressure through the fuel feed pipe and through the hoses into the fuel rail and into the fuel injectors. A pressure control valve that is located within the pump maintains the fuel pressure is when the fuel pump is not running. The fuel return pipe and the fuel return hoses return excess fuel to the fuel tank. The fuel pump is a part of the fuel sender assembly in the fuel tank. Disassemble the fuel sender assembly in order to inspect the fuel pump or in order to replace the fuel pump.