A fuel pump is a device that moves fuel from the gas tank to the engine in a vehicle. It ensures that the engine receives the right amount of fuel needed for combustion, which is essential for the vehicle to run efficiently. Fuel pumps can be mechanical or electric, with electric pumps being more common in modern cars. In most vehicles, the fuel pump is located inside the gas tank, where it can easily draw fuel. It works in conjunction with other components, such as the fuel filter and fuel injectors, to maintain optimal engine performance and reduce emissions.