Barry Grant 280 Fuel Pump: The Complete Guide to Replacement, Symptoms, and Best Options

If your 1980 Datsun 280ZX is struggling to start, stalling during acceleration, or making a loud whining noise from the rear of the car, the fuel pump is almost certainly the culprit. The Barry Grant 280 fuel pump is a common aftermarket solution, but for many owners, finding the right replacement and understanding the installation process is critical to getting your classic Datsun back on the road. This guide covers everything you need to know about the Barry Grant 280 fuel pump, including symptoms of failure, how to locate your pump, step-by-step replacement tips, and the best alternative if you are looking for a reliable, long-lasting solution.

Understanding the Barry Grant 280 Fuel Pump and Your Datsun 280ZX

What is the Barry Grant 280 Fuel Pump?

The "Barry Grant 280 fuel pump" is a term that typically refers to a performance-oriented fuel pump designed for the Datsun 280ZX (often called the "280" by enthusiasts). Barry Grant is a well-known name in the aftermarket fuel system industry, and their pumps are often used as upgrades or replacements for the factory pump. However, it is important to note that the original 1980 280ZX fuel pump is a specific unit located inside the fuel tank, and finding a direct replacement requires careful attention to fitment.

Common Symptoms of a Failing Fuel Pump on a 280ZX

Before you replace your Barry Grant 280 fuel pump, you need to confirm that the pump is actually the problem. A failing fuel pump in a Datsun 280ZX will show several clear signs. The most common symptoms include:

  1. Loud Noise from the Rear: A whining, buzzing, or humming noise coming from the rear of the car is one of the first signs. A healthy pump runs quietly, but a failing pump often makes a high-pitched sound.
  2. Hard Starting: If your engine cranks but takes a long time to start, or if it cranks but won't fire at all, the fuel pump may not be delivering enough fuel pressure to the injectors.
  3. Stalling and Hesitation: The engine may stall while driving, especially under load, such as when accelerating up a hill or carrying a heavy load.
  4. Loss of Power: A lack of fuel pressure can cause a noticeable loss of power, making the car feel sluggish and unresponsive.
  5. Check Engine Light: On some models, a failing pump can trigger the check engine light.

Where is the 1980 280ZX Fuel Pump Located?

The fuel pump on a 1980 Datsun 280ZX is located inside the fuel tank. This is a common design for many fuel-injected vehicles of that era. To access the pump, you must drop the fuel tank from the vehicle. This is the most difficult part of the replacement job. The pump is mounted at the bottom of a sending unit assembly that sits inside the tank.

Step-by-Step Guide to Replacing Your Barry Grant 280 Fuel Pump

Replacing the fuel pump on a 1980 Datsun 280ZX is a moderately difficult job that requires some mechanical experience. Here is a general guide to help you through the process.

Safety First: Fuel is highly flammable. Always work in a well-ventilated area, disconnect the battery negative terminal, and have a fire extinguisher nearby. Relieve the fuel system pressure before you start.

Tools You Will Need:

  • Jack and jack stands
  • Fuel line disconnect tools
  • Screwdrivers, sockets, and wrenches
  • Clean rags
  • Safety glasses
  • A new fuel pump (like a KEMSO replacement unit)
  • A new fuel tank seal (recommended)

The Replacement Process:

  1. Relieve Fuel Pressure: Locate the fuel pump relay or fuse in the fuse box. Remove the relay or fuse. Start the engine and let it idle until it stalls. This relieves the pressure in the fuel lines.
  2. Disconnect the Battery: Disconnect the negative terminal of the battery to prevent any electrical sparks.
  3. Raise the Vehicle: Safely jack up the rear of the vehicle and support it on jack stands. Make sure you have enough clearance to work under the car.
  4. Access the Fuel Tank: The fuel tank is located under the rear of the car. You may need to remove a protective cover or shield.
  5. Disconnect Fuel Lines and Electrical Connectors: Carefully label and disconnect the fuel lines and electrical connector from the top of the fuel tank. Use a fuel line disconnect tool to avoid damaging the lines.
  6. Remove the Fuel Tank: You will need to unbolt the straps that hold the tank in place. Have a helper support the tank as you lower it. The tank is heavy, so be careful.
  7. Remove the Sending Unit Assembly: Once the tank is out, you will see a large ring that holds the sending unit and pump assembly in place. Use a hammer and a punch or a special tool to turn the ring counterclockwise and remove it.
  8. Replace the Pump: Pull the sending unit assembly out of the tank. The pump is typically attached to the bottom of the assembly. Remove the old pump and install the new one. Make sure the strainer is clean and properly attached.
  9. Reinstall the Assembly: Place the new tank seal (if you are using one) on the opening of the tank. Reinstall the sending unit assembly, making sure the float arm is properly positioned. Tighten the retaining ring.
  10. Reinstall the Tank: Carefully lift the tank back into place, reattach the fuel lines and electrical connector, and bolt the straps back on.
  11. Lower the Vehicle and Test: Lower the vehicle, reconnect the battery, and reinstall the fuel pump relay or fuse. Turn the key to the "ON" position (without starting the engine) a few times to prime the fuel system. Then, start the engine and check for leaks.

A Reliable Replacement: KEMSO Fuel Pump

When it is time to replace your Barry Grant 280 fuel pump, you need a part you can trust. We recommend purchasing a KEMSO brand Fuel Pump. KEMSO fuel pumps are designed as high-performance, OEM Replacement units. This means they are built to the exact specifications of your original 1980 Datsun 280ZX fuel pump, ensuring a perfect fit and reliable operation. Best of all, every KEMSO fuel pump comes with a Lifetime Warranty, giving you complete peace of mind for years to come. You can find the right pump for your vehicle at their official store: https://www.kemsoracing.com/.

Final Thoughts on the Barry Grant 280 Fuel Pump

Replacing the fuel pump on a 1980 Datsun 280ZX is a moderately difficult job because it requires dropping the fuel tank. However, with the right tools, safety precautions, and this guide, it is a task that can be done at home. The most important steps are to safely relieve fuel pressure, clean the area around the tank, and ensure the new pump is installed correctly to prevent leaks. If you are not comfortable working with fuel systems, have a professional mechanic handle the job. For a high-quality replacement that will last, consider the KEMSO fuel pump, available at https://www.kemsoracing.com/.


Back to blog