Replacing Fuel Pump In 2001 Nissan Pathfinder: Step-By-Step Guide

If you're experiencing issues with your 2001 Nissan Pathfinder, you may need to replace the fuel pump. This can be a complex process, so it's recommended that you hire a professional mechanic to avoid any safety hazards.

The fuel pump is responsible for delivering fuel from the tank to the fuel injectors, and issues with the pump can cause a range of problems, from engine stalls to complete failure to start the car.

The cost of replacing a fuel pump can vary depending on labour and parts, but it is generally an expensive repair, ranging from $277 to $1,285.

1. Park the car on a level surface and set the parking brake.

2. Locate the pump assembly in the fuel tank and turn the key to the ON position. Listen for a hum from the filler opening for 2-3 seconds. If you don't hear this, the pump likely needs replacing.

3. Find and verify the fuel pump relay and fuse. If the fuse is damaged, replace it with a new one of the same amperage.

4. Check the fuel pump's operation. If it works, the issue is resolved. If not, and the fuse and relay are functioning, check for power and ground at the fuel pump. If there is power and ground, the pump is faulty.

5. Relieve the fuel system pressure and disconnect the negative battery cable.

6. Drain fuel from the tank. Disconnect the filler fuel hose and electrical connection to the pump.

7. Support the fuel tank with a jack stand and wood block. Remove the pump assembly, including the fuel level sending unit, and lower the tank.

8. Remove hose clamps and disconnect the fuel line/fuel tank hose. Extract the old pump.

9. Compare the new and old pumps to ensure the correct part is being installed.

10. Install the new pump by connecting all fuel lines.

11. Reinstall straps and bolts. Reconnect the filler fuel and electrical connector, then reconnect the negative battery cable.

12. Fill the gas tank and test the vehicle to ensure the new pump is functioning correctly.

Disconnect the battery and relieve fuel pressure

Disconnecting the battery and relieving the fuel pressure are crucial steps in replacing the fuel pump of a 2001 Nissan Pathfinder. Here is a detailed guide on these steps:

Disconnecting the Battery

Before starting any work on the fuel pump, it is essential to disconnect the negative battery cable to reduce the risk of fire. This is a critical safety precaution when working with the fuel system. Make sure the ignition is off, and the keys are removed before proceeding.

Relieving Fuel Pressure

Relieving the fuel pressure is a necessary step to avoid spills and accidents when working on the fuel pump. Here is a step-by-step process:

Step 1: Locate the Interior Fuse Panel

The first step is to locate the interior fuse panel. In the 2001 Nissan Pathfinder, this is typically found on the bottom left side of the steering wheel, behind the coin tray.

Step 2: Remove the 15-Amp Fuse

Once the fuse panel is located, remove the 15-amp fuse. This will help depressurize the fuel system.

Step 3: Start and Turn Off the Car

After removing the fuse, start the car and wait for it to die. Then, try to start it again to ensure it won't turn on. This confirms that the fuel system is depressurized.

Step 4: Prepare for Spills

As you work on the fuel pump, it is inevitable that some fuel will spill. Move the carpet out of the way and be prepared to clean up any spills promptly.

Step 5: Access the Fuel Pump

The fuel pump access hole is usually located underneath the driver's side rear seat, where the jack and tie rod are stored. You may need to remove bolts or screws to access this area.

Step 6: Disconnect Electric Connections

Before removing the fuel pump, it is important to disconnect the electric connections. Use a flat-head screwdriver to gently push in the connector clip while gently tugging upwards on the connection until it comes loose.

Step 7: Loosen Hose Clamps

Loosen the hose clamps and carefully remove both hoses from the pump assembly. Make sure to note which hose goes where to facilitate proper reconnection later.

By following these steps, you will have successfully disconnected the battery and relieved the fuel pressure in your 2001 Nissan Pathfinder, preparing you for the next steps in replacing the fuel pump. Remember to work carefully and refer to a professional mechanic if you have any doubts or concerns.

Remove the access cover and disconnect electrical connections

To remove the access cover and disconnect the electrical connections of your 2001 Nissan Pathfinder, follow these steps:

First, relieve the fuel pressure. This is done by removing the 15-amp fuse located on the interior fuse panel on the bottom left side of the steering wheel. Pull out the coin tray to access it. Start the car and wait for it to die. Start the car again and make sure it won't start. You have now depressurized your fuel system.

The access hole is underneath the driver's side rear seat, where the jack and tie rod are stored. Move the carpet out of the way, as some fuel is bound to spill. Remove the cover by taking out the four bolts with a 10mm socket or a Phillips screwdriver. Once removed, push the rubber grommet in the centre of the cover out and move it out of the way so you can access the electrical connections.

Disconnect the two electrical connections. Use a flat-head screwdriver to gently push in the connector clip while gently tugging upwards on the connection until it comes loose.

Loosen hose clamps and remove hoses from the pump assembly

To loosen the hose clamps and remove the hoses from the pump assembly, you will need a flat-head screwdriver and a Phillips-head screwdriver.

First, use the flat-head screwdriver to gently push in the connector clip while gently tugging upwards on the connection until it comes loose. There will be some fuel spillage at this stage, so it is important to move the carpet out of the way and be prepared to clean up any spillages.

Next, use the Phillips-head screwdriver to remove the four bolts holding the cover in place. Once the cover is removed, push the rubber grommet in the centre of the cover out of the way to better access the pump assembly.

With the cover and rubber grommet out of the way, you can now remove the hose clamps and disconnect the hoses from the pump assembly. Make a note of which hose goes where to ensure proper reassembly.

Remove the assembly ring and carefully lift the assembly out of the tank

To remove the assembly ring and carefully lift the assembly out of the tank, you will need to remove the six screws holding down the assembly ring with a Phillips-head screwdriver. Be careful, as these screws are very short and easy to lose. Once the screws are removed, carefully lift the assembly out of the tank. It will not come all the way out yet, as you will first need to disconnect the hoses.

To disconnect the hoses, use your fingers to push in the top tabs. Do not be rough, and avoid using pliers, as they can easily break these tabs. Once the hoses are disconnected, you can completely remove the assembly from the tank.

Compare the old and new fuel pumps to verify the correct part

When comparing the old and new fuel pumps for your 2001 Nissan Pathfinder, there are several key things to look out for to ensure that you have the correct part. Firstly, check the physical condition of the pump. If your old pump is damaged or worn, the new one should not have any similar signs of damage or excessive wear and tear. The new pump should have intact hoses and connections, with no signs of leaks or cracks.

Next, you should compare the specifications of the old and new pumps. Make sure that the new pump is compatible with your vehicle's make, model, and year. Check the voltage requirements and ensure they match your car's electrical system. The new pump should also have the same or higher performance standards in terms of fuel pressure and flow rate. Check the manufacturer's specifications for your vehicle to ensure the new pump can deliver the required fuel pressure and flow rate.

Additionally, verify that the new pump has the correct mounting brackets and fittings. It should match the old pump in terms of the number and placement of screws, clamps, and other fasteners. This ensures that the new pump can be securely mounted in the same location as the old one.

Finally, if your old pump had any specific features, such as a particular type of filter or noise-dampening design, make sure that the new pump incorporates similar features. By carefully comparing these aspects, you can verify that you have the correct fuel pump for your 2001 Nissan Pathfinder before proceeding with the installation.

Frequently asked questions