![]() Since the pump is always under the fuel, it works smoothly while remaining cool. Reasons Behind Fuel Pump Relay Failureįuel pumps function with the engine continuously, delivering high pressure to the injectors and fuel rails. But do remember that you can void the warranty on the parts and/or end up doing more damage to the car than good. If you have some basic mechanic skills, you might be tempted to repair many of your car’s problems on your own. You cannot DIY a fix for this repair thus, you have to bring the vehicle to a certified professional as soon as possible. Fortunately, this is a very rare incident. The worst of the symptoms, a burning fuel pump relay is caused due to high voltage or current. If your car has a high mileage to its name, include a fuel pump relay check in the regular performance maintenance checks to ensure it’s in top-notch condition. While not a direct indication, the growing age of your vehicle is a message that many parts of it will start to malfunction now. When the ignition is shut off, the fuel pump relay is once again engaged, only long enough to shut off the fuel pump and power down the engine. The fuel pump relay is turned off once the engine starts running. Although a little voltage is produced, it is consistently supplied to the fuel pump. Activated for long enough, the fuel pump relay supplies the required current to move the fuel pump. Once the key in the ignition is turned to start the car, the combustion engine’s “start cycle” begins. If it’s not in plain sight, refer to the owner’s manual as the fuel pump relay could be located in various parts depending on the model and make of the car: on the firewall, under the hood, or near the steering column. If you want to know more, make sure to check out this video. It is a long black box containing many relays and fuses. In most vehicles, you can find the fuel pump relay in the fuse box inside the engine bay. Troubleshooting fuel pump problems - Learn about the working of fuel pumps Location Of The Fuel Pump Relay In contrast, when the ignition is shut off, the power is cut off. When the ignition is turned on it activates the fuel pump relay and it starts supplying electricity to the pump. It is generally controlled by the Powertrain Control Module (PCM) or the ignition. Fuel is needed by the combustion engine to run, and the fuel pump relay ensures there is never a dearth of that to the engine. The fuel pump relay is an essential part of the combustion engine. Maintenance Tips What Is A Fuel Pump Relay?.Learn all about fuel pump relays, how they work, signs that the component is failing, how to diagnose, and many maintenance tips to extend its service life. You cannot drive a car with a bad fuel pump relay.Ī poor or malfunctioning fuel pump relay displays symptoms to let the driver know that something is wrong. If there is a problem with the fuel pump relay, there will be issues with the fuel pump. “Relay” translates to “to receive and transmit.” When the ignition is turned on, the job of the fuel pump relay is to supply the necessary voltage to the fuel pump. There are multiple reasons why a fuel pump can go bad. This component can be found inside a vehicle’s fuel tank and it is responsible for creating pressure through the fuel lines so gasoline is pushed to the combustion engine. Modern-day engines require a specific amount of fuel to function properly.
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