A fuel pump is an integral part of the fuel injection system of the automobile. Responsible for supplying pressure to the fuel injectors this pump is electrical controlled by the car's computer (PCM) using a fuel pump relay. A fuel pressure regulator is used to control the pressure which can be located inside the fuel pump or externally on the fuel rail.
Most fuel injection system primary fuel pumps are located inside the fuel tank and have the fuel level sensor connected to the pump housing. Even though this electric motor is submerged in fuel there is no danger of fire due to the lack of oxygen inside the tank. Servicing the pump or level sender requires the removal of the pump which can be done through a service port in the car's body or by removing the fuel tank.
Fuel Pump Features
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