Fuel Pump Replacement
How are fuel pump issues diagnosed?
If the engine won't start, the mechanic will check for pressure at the fuel injectors when trying to start the car. If the injectors are getting enough fuel pressure, the next step is to check that the pump is delivering enough fuel.
If the pressure is low or nonexistent, the next step is to check the pump's electrical circuit. If the pump isn't receiving enough voltage or has a bad connection, the circuit may need replacing.
If the pump is working but is providing low pressure or too little fuel, the mechanic will check the fuel filter, as well as the electrical and mechanical condition of the fuel pump itself.
How is a fuel pump replaced?
The first step is to disconnect the battery, in order to reduce the chance of a fire.
For pumps inside the fuel tank, there will usually be an access cover that needs to be removed. With the cover off, the technician can replace the pump and pre-pump filter screen. In some cases, fuel will need to be drained before removing the access panel.
When the pump is outside the tank, the mechanic will disconnect the fuel lines, remove the pump and install the new one. Once the pump is replaced, another check will be done to ensure there are no fuel leaks and that the problem is solved.
