Replacing The Fuel Pump In Your 2008 Infiniti G35x Sedan

If you're experiencing issues with your 2008 Infiniti G35X Sedan, such as stumbling when starting up or a lack of power during acceleration, you may need to replace the fuel pump. The fuel pump is located in the fuel tank, and you can access it by removing the rear seat cushion and locating the access cover. It's important to note that you should not remove the fuel tank, as it will require taking out the rear axle. When installing a new fuel pump, be cautious to avoid damaging the fuel level sensor. Additionally, remember to detach the fuel hoses from the old pump and attach them to the new pump before installation.

Disconnect the battery and drain the fuel tank

Disconnecting the battery and draining the fuel tank are crucial steps when replacing the fuel pump on a 2008 Infiniti G35x sedan. Here is a detailed guide on how to approach these steps:

Disconnect the Battery:

• Locate the battery in your Infiniti G35x sedan. It is usually found in the engine bay, often near the front of the vehicle.
• Identify the negative (-) and positive (+) battery terminals. They are typically marked or color-coded for easy identification.
• Loosen the nut or bolt securing the negative battery cable to the terminal using an appropriate-sized wrench or socket. Do not allow the wrench or socket to touch any metal parts of the car, as this could result in a short circuit.
• Carefully remove the cable from the battery terminal. You may need to wiggle it gently to detach it completely.
• Repeat the process for the positive (+) battery cable, ensuring that the wrench or socket does not touch any metal surfaces.
• Once both cables are disconnected, secure them away from the battery to prevent accidental contact.

Drain the Fuel Tank:

• Locate the fuel tank drain plug. It is typically located at the bottom of the fuel tank and may require you to jack up the car and crawl underneath to access it.
• Place a suitable container under the drain plug to collect the fuel. Make sure the container is approved for storing flammable liquids and has a capacity greater than the fuel tank's volume.
• Carefully remove the drain plug using the appropriate tool, such as a wrench or socket. Have a rag or towel ready to catch any initial spillage.
• Allow the fuel to drain completely. Depending on the fuel level, this may take several minutes.
• Reinstall the drain plug securely, ensuring it is tightened to the manufacturer's specifications.
• Properly dispose of the drained fuel at an authorized facility or recycling center. Do not pour it down the drain or into the environment.

Remember, always work in a well-ventilated area when dealing with fuel, and take the necessary precautions to avoid any open flames or sparks that could cause an explosion. It is also essential to dispose of the drained fuel responsibly and according to local regulations.

Remove the rear seat and access cover

To remove the rear seat and access cover of your 2008 Infiniti G35X Sedan, start by opening the rear doors of your car. You will see that the rear seat cushion is held in place by a few bolts. Use the appropriate-sized socket wrench to remove these bolts. Once the bolts are removed, simply lift the rear seat cushion up and out of the car.

With the rear seat cushion removed, you will now have access to the fuel pump access cover. This cover is usually located near the top of the fuel tank. It is often secured in place with screws or bolts, which you can remove using a screwdriver or socket wrench. Be sure to keep track of the screws or bolts you remove, as you will need to put them back when you're finished with the fuel pump replacement.

Once the access cover is removed, you should be able to see the top of the fuel tank and the fuel pump assembly. From here, you can proceed with the next steps in replacing the fuel pump, such as disconnecting the electrical connector and fuel supply line from the fuel pump module.

Disconnect the electrical connector and fuel supply line

To disconnect the electrical connector and fuel supply line from the fuel pump module of your 2008 Infiniti G35x Sedan, follow these steps:

First, depressurize the fuel system to release any built-up pressure. This is an important safety step to prevent fuel spray and leakage during the disconnection process. Next, disconnect the battery to minimize the risk of electrical short circuits.

Then, drain the fuel tank to about 7/8 full. This will reduce the risk of fuel spillage when you remove the fuel pump module. Now, remove the rear seat and access cover to expose the fuel tank. Locate the electrical connector and fuel supply line attached to the fuel pump module. Before disconnecting them, clean the area around the retainer to ensure there is no dirt or debris that could fall into the fuel tank.

Once the area is clean, carefully disconnect the electrical connector by releasing the locking tab and gently pulling it away from the fuel pump module. Set the electrical connector aside, ensuring it is away from the work area to prevent accidental reconnection.

Now, focus on the fuel supply line. Loosen the clamp that secures the fuel supply line to the fuel pump module using the appropriate tool. Be gentle to avoid damaging the clamp or the fuel line. Once the clamp is loose, carefully slide the fuel supply line off the fuel pump module. Place a container or rag underneath the connection to catch any residual fuel that may drip out.

With the electrical connector and fuel supply line disconnected, you can now proceed with removing the fuel pump module for replacement. Remember to refer to the appropriate repair manual or seek professional assistance if you are unsure about any steps during this process.

Remove the old pump and attach the new one

To remove the old fuel pump and attach the new one, you will need to follow these steps:

Firstly, depressurise the fuel system and disconnect the battery. Drain the fuel tank to about 7/8 full. Then, remove the rear seat and access cover. Disconnect the electrical connector and fuel supply line from the fuel pump module. Clean the area around the retainer and remove the bolts. Lift the module to access the crossover tube and disconnect it.

Now, you can remove the old fuel pump. Take out the old O-ring and check the fuel inlet strainer. When installing the new pump, be sure to use a new O-ring and grommet, aligning the outlet pipes correctly. Ensure that the new pump is securely attached before proceeding.

Finally, install the new fuel pump, regulator, and sensor assembly. Be very careful when installing the new pump to avoid damaging the fuel level sensor. Remember to attach the fuel hoses to the new pump before installation.

Reinstall the rear seat and cover

To reinstall the rear seat and cover, follow these steps:

• Ensure the fuel pump and fuel pressure have been checked and are functioning correctly.
• Reinstall the rear seat cushion by aligning it with the mounting points and pushing it firmly into place.
• Replace the access cover and secure it with the appropriate screws or fasteners.
• Reconnect the battery and turn on the ignition to test the fuel pump.
• Listen for the fuel pump to activate and ensure there are no unusual noises.
• Reinstall the fuel tank if it was removed.

By following these steps, you can confidently reinstall the rear seat and cover, ensuring a safe and secure finish to your fuel pump replacement.

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