Fuel Pump Relay – especially in Fords, these things love to fail! How to tell if fuel pump relay is bad (6 Signs) But before we proceed, it is important to know a bit more about the relay in general. The good news is it’s easy to check for a broken injector pump relay. If there’s something wrong with the relay, you can expect the fuel pump to fail intermittently. Every time you press the gas pedal, the injector pump relay responds by supplying the fuel pump with the required voltage. The relay activates the fuel pump to pressurize the fuel system as you turn the key.Īnd all of this is happening with the precision of an orchestra. The fuel pump relay is also responsible for helping your vehicle to start. In return, the fuel pump delivers the fuel to the injectors and inside the combustion chamber. It is the job of the fuel injector pump relay to supply a steady flow of electrical current to the fuel pump.

The engine demands a certain level or amount of fuel at any given moment. Modern engines need precise amounts of fuel to run properly.

Step 9: (If Needed) Replace the bad fuel pump relay.

Step 8: Feed power to the input voltage pin.

Step 7: Grab a multi-meter tool and set it to resistance mode.

Step 5: Disconnect the negative cable from the car battery.

Step 4: The fuel pump relay will emit a clicking or buzzing sound when turning the key in the ON position.Step 3: Raise the hood and locate the fuel pump relay.Step 2: Turn the ignition key in the ON position but don’t start the car.Engine Performance Issues – Stalling, Idling, Acceleration, Not Starting How to tell if fuel pump relay is bad (6 Signs).

Bad fuel pump module