The fuel pump relay functions as the primary electronic switch that controls power to the fuel pump.

The relay is controlled by the ignition or (PCM).

So, Learning how to tell if fuel pump relays are bad is an important part of vehicle maintenance.

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Fuel Pump Relay – Function And Testing Procedures

Engine Will Not Start – But Fuel Pump, Spark and Compression Are Good

The core function of fuel pump relays is to produce a small amount of voltage in a steady and consistent manner. Consequently, supplied to the fuel pump once the ignition is turned on.

Consequently, The fuel pump relay is controlled and regulated by the powertrain control module or the ignition control module. Once the ignition is started, a current will be provided from the fuel pump relay to the fuel pump. As a result, Activating the fuel pump to carry out its function.

The engine requires fuel when it needs to start, and a relay ensures that the fuel is provided. Also, The fuel pump that delivers the fuel to the engine runs electrically from the car battery.

Usually a bad or failing fuel pump relay will produce a few symptoms that can alert the driver.

  • Engine stalls
  • Engine does not start
  • No noise from the fuel pump

Learning how to tell if fuel pump relay is bad and replacing it when needed is an important part of vehicle maintenance. So, This relay is a small yet integral part of your engine. If it fails, it could prevent your car from starting, negatively impacting its performance.

So, These were the major symptoms that you need to watch out for. Finally, Being alert and identifying such symptoms of car problems in advance can save you a lot of money.

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