This research paper will cover fuel pumps for diesel applications. Fuel pumps are a very important part of the diesel sector. Fuel pumps create pressure to inject fuel into the cylinder. it powers the injectors. You need the pressure for the injectors to atomize the fuel into the cylinder so the compression can ignite it. How it works, there is an impeller inside the fuel pump that spins like a rotary engine. it compresses the fuel into a smaller hole which puts it under pressure. Pressurized fuel fills the lines going to the injectors. The fuel pump. If you run out of fuel and the pump lets air in, your engine will shut down and not start. This can cause your fuel pump to shut down if you keep trying to start it with air in the lines. Last year a boy came into our lab and said he was going down a hill and his truck stopped. no one knew what was wrong with his truck. after many random ideas we came to the conclusion that its fuel pump had failed. we opened its fuel line to see if any fuel was coming out and it hissed as it spewed air. when we put the line back on, ...