The main component of the fuel pump module is the electric pump. Its task is to supply fuel from the tank to the engine through the injection system. Like all car parts, the fuel pump module eventually fails and is subject to complete replacement, as recommended by manufacturers. However, repair and maintenance are also possible. Preventive measures include replacing the fuel filter, blowing out the ventilation system, and cleaning the fuel tank of impurities, dirt, and moisture.
Depending on what has failed, repair work may involve replacing the electric pump, plastic tubes, electrical connectors, and float. The main symptoms of a failing fuel pump module are:
- When the car's ignition is turned on (but you don't have to start the car), the quiet hum of the electric pump is not heard.
- The engine doesn't start or starts only after prolonged ignition.
- When increasing engine RPMs, a loss of power occurs, up to the point where the engine may stall.
If you notice these symptoms, we strongly recommend consulting a Certified Auto Repair service. We do not recommend repairing or replacing the fuel pump module yourself, as this is associated with increased risk. Especially dangerous are gasoline vapors; even the slightest spark can cause an explosion, and consequently, both you and your car could suffer significant damage. It is essential to consult a professional for quality diagnostics, repair, or replacement of the fuel pump module. A diagnostic test may even reveal that you simply have a burnt fuse or relay, or a break in the electric circuit of the motor, eliminating the need for module replacement or repair altogether. When replacing the fuel pump module or motor, be sure to carry out diagnostics and measure the fuel pressure in the system before and after repairs. Note that even a slight drop in fuel pressure can lead to unstable engine performance.
The time and cost of repair can vary significantly depending on your car, specifically how the fuel pump module can be extracted from the fuel tank. In most cases, it is sufficient to open the cover located under the rear seat or in the trunk. However, some cars require removing the fuel tank, significantly increasing the time needed for repair. To avoid costly future repairs, you can make a hole above the fuel pump module while the tank is removed and cover it with a suitable lid. To extend the service life of the fuel pump module, we also recommend avoiding driving with an empty tank. As odd as it sounds, gasoline acts as a coolant and lubricant for the pump. It's also important to replace the fuel filter on time and avoid using low-quality fuel.
