If you want to avoid your fuel pump from failing and dodge the costly replacement that comes with this, then it’s good to first understand what causes fuel pumps to fail. Knowing this can help you take the proper measures to prevent total failure. Let’s look at some of the most common reasons why fuel pumps fail.

Fuel contamination

Your gas gets contaminated over time by small particles from dust, rust, dirt, moisture, and debris. As contaminated gas passes through the filter, these particles get trapped and gradually clog up the filter. With a significantly clogged filter, your fuel pump has to work harder in order to pump the fuel, putting a lot of strain on it.

Wear and tear

Your car’s components will gradually suffer wear and tear over time. If your filter is clogged with contaminants, this process will accelerate as the fuel pump works harder to get things moving, meaning it will wear out more quickly. Also, any particles that don’t get stopped by the filter can cause additional wear to your fuel pump.


We listed moisture as one of the contaminants that can affect your fuel and fuel pump. If this moisture builds up in the gas tank and separates from it, then it can cause rust and corrosion within your fuel pump, which will make it fail more quickly.


One purpose your fuel pump serves is to cool down its own components as well as the fuel itself. It does this by pumping unused fuel back into the tank. So, if you often drive with low gas levels, this function does not work as efficiently. This can cause the fuel pump to overheat and fail.

Electrical faults

The fuel pumps in most vehicles are electric. Electrical faults in the fuel pump can rapidly contribute to its failure. If any of the pumps wires or connectors become loose, rusted, or overheated and melted, then failure could occur if the issue is not resolved.

How to stop your fuel pump from failing

To avoid the above problems and prevent your fuel pump from failing, you should:

  • Avoid using low-quality or contaminated fuel
  • Avoid running your car on a low gas tank
  • Check and replace your filters regularly
  • Regularly clean your fuel tank
  • Arrange regular professional maintenance

If you have a problem with your fuel tank or just want to make sure it is properly maintained, you can contact Bill’s Auto Clinic for expert car repair in Winston Salem, Walkertown, Clemmons, and beyond.

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