If a fuel pump relay fails, the car will get no fuel and start no matter how much time you would have waited. Fuel pump relay, which turns the fuel pump on and off — normally at 12 volts. Failure of this relay can result in the engine stalling because the fuel pump will stop working. Industry data estimates that 25% of these problems are due to a defect in the relay.
One of the most common symptoms associated with a problematic fuel pump relay is an engine that cranks but does not start. The relay is not passing power to the fuel pump. A survey from the Automotive Service Excellence (ASE) says that almost 18% of technicians experience this problem with cars they fix. In such cases it is crucial to check the operation of the relay.
One of the most reliable forms of diagnosing troubleshooting, as prescribed by every car manufacturer who has ever existed, is an electrical test.replaceAll('',''); With a multimeter you can check the voltage at the fuel pump connector. Aiding in this respect is the relay detecting whether there is a change in voltage. This testing approach, also advocated by the ASE, verifies if power makes it to the fuel pump's wiring in response to turning the key on.
Sophisticated sounds with the relay area can also represent a breakdown in addition to common clicking on noises. The symptoms are these classic relay sounds where the relay is not holding solid power, and so intermittent supply of power. According to skilled car enthusiast and YouTube mechanic Jason Peters, “If you hear a clicking noise, the relay is too weak … it's just waiting for failure.”
For reference, some common symptoms of problems with the relays include a sudden loss of power under acceleration and stalling at low speeds. According to the National Highway Traffic Safety Administration (NHTSA), approximately 15% of these incidents can be traced back to a problem with the relays. This last fact demonstrates the importance of doing regular inspections in your relays to keep your vehicle in top shape.
To sum it up, if you do encounter starting troubles or even a rough engine run, it could be the fuel pump relay to blame. This must operate correctly for the engine to receive enough fuel. If you suspect that the relays are at fault, another possible problem is a defective Fuel Pump, so it is important to check them both to ensure the proper operation of your vehicle.
