How much does a fuel pump replacement cost?

What is a fuel pump?

Before fuel injection, the fuel pump was a mechanical part in the engine bay, using engine movement to pull fuel from the tank to the carburetor. With advances in electronic fuel injection and engine management, it became an electric pump in the fuel tank.

When the ignition is switched on the battery power is sent to the fuel pump, which operates for 3-4 seconds to build fuel pressure in the fuel lines.

Once the engine is cranked over, this pressure allows the engine to start and the fuel pump continues to supply fuel to the engine to keep it running.

What are the symptoms you may need to have your fuel pump replaced?

Common symptoms to look out for when you think your car fuel pump may need to be replaced are:

• The vehicle cranks over but does not start
• Engine hesitates under acceleration
• Check engine light is on
• Reduced performance and increased fuel consumption

How is the fuel pump replaced?

First, the fuel pump needs to be confirmed it has failed with a thorough inspection. Then the inspection plate inside the vehicle will be removed or, if necessary, the entire fuel tank. 

Next, the fuel pump assembly will be removed and replaced with a new one, ensuring all connections are secure. Once completed, the fuel pump assembly will be refitted and the fuel tank reinstalled if it was previously removed.

Then the vehicle will be started and inspected for any potential fuel leaks. Finally, a road test will be performed to ensure everything operates correctly and the new fuel pump functions as expected.

Can I drive with a bad fuel pump?

A weak fuel pump might still deliver fuel, but insufficient pressure can make starting the vehicle difficult. This weakened state may lead to needing more cranks than usual to start the engine, and in severe cases, multiple key turns might be required before the vehicle starts.

How important is replacing a bad fuel pump?

Your vehicle relies on fuel to keep it running, and a failed fuel pump can leave you stranded on the side of the road, or cause your engine to cut out without warning.

Remember not to let your fuel tank reach 'empty' regularly, as this can place undue stress on the fuel pump and lead to premature failure. The fuel pump depends on a sufficient fuel supply to remain cool, so it's recommended to keep your tank at least a quarter full whenever possible.

If you think your fuel pump needs to be replaced, get a free quote from a specialist today!