Fuel pumps & filter are parts of fuel system in your car which deliver the fuel to the cylinder chamber.   It's important for fuel in your car to be as clean as possible.

When a car lacks power, has poor engine performance, poor gas mileage, or problem starting, there's a possibility that it has damaged/bad fuel pumps & filter. The fuel pump delivers fuel to your car's system while fuel filter traps contaminants that clog carburetor or clog & starve the fuel injection system for fuel. These two are integral to the delivery of clean, efficient fuel in your car.