The Function of the fuel pump is to supply fuel at a certain pressure to the engine fuel injection system. However,the fuel pump have a limited life.If you notice any of the following signs with your car: (1).Engine Sputtering at High Speeds (2).Decreased Fuel Pressure (3).Losing Power when the Vehicle is under Stress (4).Inability to accelerate (5).Decreasing Gas Mileage (6).Engine Not Starting This may indicate that you need to replace the fuel pump Fuel Pump Replacement Guideline: Please Note the following before replacing the fuel pump: 1.Ensure that you are in a well ventilated and level work area. .