Replacing The Fuel Pump In An Infiniti G35: Step-By-Step Guide

If your 2008 Infiniti G35 is experiencing issues such as stalling, surging, or difficulty starting, it may be time to replace the fuel pump. The fuel pump is responsible for delivering fuel to the fuel injectors, pumping and filtering the fuel for combustion in the engine. To access the fuel pump, you will need to remove the rear seat cushion and locate the access cover to the top of the fuel tank. When purchasing a replacement fuel pump, ensure that you select the correct part number for your specific vehicle model. Several online retailers offer fuel pumps for the 2008 Infiniti G35, with prices ranging from $300 to $650.

Disconnect the fuel level sensor from the fuel pump

To disconnect the fuel level sensor from the fuel pump of a 2008 Infiniti G35, follow these steps:

First, remove the rear seat to expose the fuel sensor covers and connectors. There are two clips that need to be pulled to lift the rear seat out. If they are broken, simply lift the rear seat out.

Next, locate the fuel pump outer cover and unscrew it by opening the four screws holding it in place. If any of the screws are damaged, use pliers to turn them open.

Now, disconnect the pump from the electrical system. There should be an electrical connector attaching the fuel pump to the rest of the car's electrical system.

After that, disconnect the fuel hose that sends fuel to the engine bay from the pump. Cover the area with a towel in case there is any fuel leak from the hose. Hold the tube upright using a clamp.

Finally, open the five screws before disconnecting the fuel hose so that it is easier to remove the pump once the hose is off. Slowly pull out the fuel pump, being mindful of the black electrical hoses on the outer periphery of the pump.

This process will separate the fuel level sensor from the fuel pump, allowing for further maintenance or replacement of parts. Remember to exercise caution when working with fuel and electrical systems, and refer to a certified mechanic if you are unsure about any steps.

Remove the retainer cap and pump from the filter housing

To remove the retainer cap and pump from the filter housing of your 2008 Infiniti G35, you will need to follow a few steps. Firstly, separate the fuel level sensor from the fuel pump. Disconnect and separate the assemblies, removing the old outlet pipe O-ring. If necessary, replace the entire unit, including the fuel level or temperature sensor.

Next, remove the retainer cap and pump from the filter housing. You can discard the rubber grommet. After this, remove the fuel pressure regulator and old O-ring. Now, you can install the new fuel pump, regulator, and sensor assembly. Be sure to use a new O-ring and grommet, aligning the outlet pipes correctly.

This process should be done with care and attention to ensure the correct replacement of the retainer cap and pump.

Install the fuel pump, regulator, and sensor assembly

To install the fuel pump, regulator, and sensor assembly, you will need to follow these steps:

Firstly, ensure that you have the correct part for your specific vehicle. For the 2008 Infiniti G35, the part number for the fuel pump is either 17040-EJ81A or 17040-JK60A. The part should include the fuel pump, regulator, and sensor as a complete assembly.

Before beginning the installation, it is important to depressurize the fuel system and disconnect the battery. Next, drain the fuel tank to about 7/8 full. You will then need to remove the rear seat and access cover to reach the fuel pump module. Disconnect the electrical connector and fuel supply line from the module. Clean the area around the retainer and remove the bolts holding the module in place. Lift the module to access the crossover tube and disconnect it.

Now you can install the new fuel pump, regulator, and sensor assembly. Use a new O-ring and grommet, ensuring that the outlet pipes are aligned correctly. Tighten the bolts to secure the assembly in place. Reattach the electrical connector and fuel supply line to the new fuel pump module.

Once the installation is complete, you can reconnect the battery and pressurize the fuel system. It is important to check for any leaks before starting the vehicle.

Please note that working on fuel systems can be dangerous, and it is always recommended to consult a qualified mechanic if you are unsure about any part of the process.

Check for a clogged fuel filter/inlet strainer

To check for a clogged fuel filter/inlet strainer on a 2008 Infiniti G35, you must first locate the fuel pump in the fuel tank. You should be able to hear the fuel pump when the ignition is turned on. Next, use a fuel pressure gauge with a hose and adapter to check the fuel pressure. After relieving the pressure, remove the rear seat cushion and access cover, then connect the gauge. Once the engine is started, compare the reading on the gauge with the specifications. If the fuel pressure is too low, this could indicate a clogged fuel filter or inlet strainer.

The fuel filter in the Infiniti G35 is a cartridge-style filter attached to the fuel pump assembly. It is located inside the fuel tank, and can be accessed by removing the rear seat and the access cover. When replacing the fuel filter or inlet strainer, it is recommended to also install a new O-ring, as sealing the old one back up can be difficult. Additionally, it is best to ensure that the fuel tank is less than 1/4 full before attempting to remove the fuel pump assembly, as a nearly full tank can make the process more difficult and messy.

It is worth noting that the Infiniti G35 owner's manual does not specify a replacement interval for the fuel filter. However, some G35 owners have reported replacing their fuel filters every 36,000 miles.

Remove the rear seat cushion and access cover to find the fuel pump

To remove the rear seat cushion and access cover to find the fuel pump, follow these steps:

First, depressurize the fuel system and disconnect the battery. Next, drain the fuel tank to 7/8 full. Then, remove the rear seat cushion by raising the bottom of the seat cushion to release the wire from the plastic hook. Pull the seat cushion forward to remove it. This may require a lot of force, but be careful not to break anything. Once the rear seat cushion is removed, you will see the access cover. Remove the access cover to find the fuel pump.

It is important to note that you should always take the necessary safety precautions when performing any work on your vehicle. Be sure to refer to your vehicle's service manual for detailed instructions and safety information specific to your car.

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