Fuel Pump & Parts

There are various types of automotive fuel pumps, but all of them have one thing in common. Their main function is to feed the car engine with the fuel by pumping gas from the tank, which would cause a positive pressure in the fuel line to push the fuel all the way up to the injectors. There are a lot of fuel pumps which are controlled by a relay, and then it is controlled by the ignition switch. It is worth mentioning that there are some relays which are controlled by the engine control module.

A fuel pump is an essential part of the auto's fuel injection system. It gives the fuel injectors pressure. It is controlled by a computer for the car (PCM) using a relay for the fuel pump. The pressure is controlled by the fuel pressure regulator inside the fuel pump, or externally on the fuel rail.

There are many fuel injection systems where the fuel pumps are located within the fuel tank, and a fuel level sensor is connected to the pump housing. The electric motor would be submerged in fuel, and there would then be no danger of fire inside the tank due to lack of oxygen. The pump removal would need to be serviced by the pump or level sender. It can be achieved in the car's body with a service pump, or by detaching the fuel tank.