Fuel Pump

What is a Fuel Pump?

Good gas atomization ensures maximum power. To ensure good atomization of the gas, it is injected into the engine under high pressure. The fuel pump creates and delivers pressurized gas to the fuel injectors.

The fuel pump is located either in the fuel tank itself or under the vehicle near the fuel tank. If the fuel pump is in the fuel tank, there may be a removable cover under the rear seats or trunk floor that allows access to the fuel pump. On many vehicles, if the fuel pump is in the fuel tank, the tank must be removed from the vehicle to replace the pump.

Gasoline is highly flammable. When replacing the fuel pump, the battery must be disconnected from the vehicle and proper safety procedures followed to avoid fire and personal injury.

Symptoms of Wear or Failure

  • Engine will crank, but fail to start
  • Fuel pump may leak internally
  • Excessive noise
  • Lack of power
  • Hesitation when accelerating

Related Repair Advice

  • Most modern vehicles use an electric fuel pump, which is mounted inside the fuel tank. Some vehicles have an access panel that can be removed to replace the pump without having to remove the fuel tank.
  • In-tank fuel pumps are submerged in fuel to help keep them cool. Running out of gas can damage the fuel pump.
  • The fuel filter should always be replaced when replacing the fuel pump
  • A clogged fuel filter or problems with the electrical system powering the fuel pump can result in symptoms similar to a failed fuel pump. Have the shop verify that the pump is the problem before replacing.
  • Gasoline is highly flammable. When replacing the fuel pump, the battery should be disconnected and proper safety procedures followed to avoid fire and personal injury.