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Fuel Pumps for Nissan D21

Nissan D21 trucks require a working fuel pump to move gas from the fuel tank to the engine. D21 trucks have an electric fuel pump, which is located inside the fuel tank. If you need a replacement you can choose from a variety of fuel pumps for Nissan D21.

How does the Nissan D21 fuel pump work?

Your Nissan pickup’s fuel pump works by creating positive pressure in the fuel lines, which moves the gasoline from the fuel tank to the engine. The fuel pump works in conjunction with the fuel pump relay. The fuel pump relay is started when you start your vehicle, and it provides the current the fuel pump needs to pump fuel to your engine.

How do you maintain the Nissan D21 fuel pump?

The fuel pump in your D21 can last the life of your vehicle if it’s properly maintained. There are a few steps you can take to maintain your fuel pump:

  • Keep enough gas in your fuel tank. Running your gas tank down to empty can cause the fuel pump to overheat or become plugged with debris. Instead, keep the tank of your Nissan at least a quarter full.
  • Replace the fuel filter regularly. Fuel filters typically last 20,000 to 40,000 miles.
  • Check your gas cap. Make sure it has a good seal. Without a good seal, debris can get into the fuel tank and into the fuel pump.
How do you know when to replace the fuel pump?

Your Nissan will give a few signs that the fuel pump is beginning to go bad:

  • Your mileage drops. If you suddenly experience a change in your average miles per gallon, it can be a sign your fuel pump needs to be checked.
  • Sputtering or hesitating at high speeds. If you’re speeding along and suddenly your vehicle hesitates or jerks, then resumes speed, it may be a sign of a bad fuel pump.
  • Sudden surges in speed without depressing the gas pedal.
  • Your pickup truck doesn’t start or hesitates while starting.
  • Your fuel pressure is low. You can check the fuel pressure of your Nissan with a fuel pressure gauge.
  • The temperature in your car increases and the car stalls out.
How do you diagnose a problem with the fuel pump?

There are a few steps to narrow down whether an issue with your Nissan pickup truck is due to the fuel pump:

  • Check the fuel pump fuse and replace if needed.
  • Check the fuel filter and replace if needed.
  • Check the fuel pressure while revving the Nissan. If the pressure doesn’t increase when you’re revving the engine and you’ve checked the fuse and filter, the problem is with your Nissan truck’s fuel pump.