Fuel Pump

The fuel pump is responsible for retrieving the fuel— gasoline or diesel – from the tank and delivering it to the ignition chamber, so you can start your car or truck and keep it running. Most modern engines have an electronic ignition system, and this requires the fuel to arrive in the piston cylinder firing chamber at a more highly pressurized state, to reach necessary combustion ratios. To make this happen accurately and consistently, the electric fuel pump was created.

When you turn the key to the “ON” position, an electric signal is sent to the pump which tells it to begin building pressure on the fuel resting inside it. When the key is turned all the way over to start the engine, the pump sends the pressurized fuel down the line to be ignited.

What Happens Inside the Fuel Pump

A fuel pump is actually comprised of several pumping systems inside the small canister-shaped container, which is about the size small jelly jar. First in line is the fuel feed pump, which works like a vacuum to suck the gas or Diesel in from the tank. The fuel is filtered through a mesh screen to block any tank residue, and is then fed into a metering pump, where plunger-like mechanisms push-pull, spin and jostle the liquid to create intense pressure. This causes the fuel to begin thinning and separating, and this process is monitored by sensors to insure the fuel’s state meets specific measured standards before it leaves the pump.

Once the fuel has been pressurized to precise calculations, the plunger pushes it out of the pump, down through the fuel line to the fuel rail. From there, a tiny nozzle sprays a fine mist of fuel into the air intake chamber of the cylinder. A spark plug fires and the fuel ignites, and the force provides energy to push the pistons.

Fuel Filter