Your car’s engine needs a regular stream of fuel to keep it humming along. The fuel pump is a device that moves fuel from your tank to the engine, supplying the fuel at a constant pressure to ensure that your engine runs smoothly. Depending on the age of your vehicle, you may have either a mechanical or an electronic fuel pump, and, if you’re attentive, you can catch the symptoms of a failing fuel pump and have it repaired or replaced before it leaves you stranded on the side of the road.