Auto Repair Encyclopedia
Fuel Pump Replacement
Sometimes referred to as Fuel Pump, Fuel Pump Replace, Replace Fuel Pump
The fuel pump creates pressure in the fuel lines, which pushes gasoline through the fuel injectors and into the engine.
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.
Mechanics' Corner: More Technical Detail
When considering fuel pump/fuel supply issues, remember that both fuel pressure and volume must be correct.
About this Repair: Fuel Pump Replacement
What to watch out for
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.
Recommendations
The fuel filter should always be replaced when replacing the fuel pump.
Why this happens
A failing fuel pump will not create enough pressure in the fuel system, potentially resulting in a loss of engine power or a "no start" condition. You may also have a lean running condition that can set a diagnostic trouble code and turn on the Check Engine Light.
Fuel pumps require replacement if they leak or begin making too much noise, which is a sign of malfunction.
