Replacing The Fuel Pump In A 2002 Jeep Grand Cherokee

Replacing the fuel pump in a 2002 Jeep Grand Cherokee is a moderately complicated job that can be done at home with the right tools and safety precautions. The fuel pump is located inside the fuel tank and can be accessed by removing the tank or cutting a hole in the cargo bay above the pump. Before starting, it is important to release the fuel system pressure and drain the fuel tank to prevent contaminants from entering the tank. The pump is secured with a locking ring, which must be turned counterclockwise to remove. When installing the new pump, it is important to use Vaseline to create a watertight seal and ensure that the float and fuel level gauge are not damaged. The average cost of a fuel pump replacement across all vehicles is between $611 and $894, but it can be more or less expensive depending on the specific Jeep model.

Disconnect the battery and jack up the rear end of your Jeep

Disconnecting the battery and jacking up the rear end of your Jeep are crucial steps in replacing the fuel pump of your 2002 Jeep Grand Cherokee. Here is a detailed guide on how to approach these steps:

Disconnect the Battery

It is always advisable to disconnect the battery when working in your Jeep's engine compartment or on any component of the fuel system. Start by locating the negative (black) battery terminal. Using the appropriate tools, proceed to disconnect this terminal. Remember to work in a well-ventilated area, and ensure there are no sources of flame, heat, or sparks nearby.

Jack Up the Rear End of Your Jeep

For this step, you will need wheel chocks and jack stands. Place the wheel chocks in front of the front wheels to keep them securely in place. Next, use a jack to lift the rear end of your Jeep. Carefully position the jack stands in the approved locations, and then lower the Jeep onto these stands for stability. It is crucial to use jack stands instead of relying solely on a hydraulic floor jack when working under your vehicle.

At this point, you have successfully disconnected the battery and jacked up the rear end of your 2002 Jeep Grand Cherokee. Remember to exercise caution and refer to a trusted repair guide or mechanic if you're unsure about any part of the process.

Next Steps

Now that you have completed these initial steps, you can proceed to the next phase of replacing the fuel pump. This typically involves removing the inner fender, disconnecting the filler neck, and then proceeding to disconnect the tank vent hose and fuel pump power supply. Remember to have the necessary tools and safety equipment on hand before continuing.

Remove the inner fender, filler neck, tank vent hose and fuel pump power supply

To remove the inner fender, filler neck, tank vent hose and fuel pump power supply of a 2002 Jeep Grand Cherokee, follow these steps:

Removing the Inner Fender

Use a Phillips-head screwdriver to remove the left (driver's side) rear inner fender cover. This will give you access to the fuel filler neck. Be sure to also remove the fender liner from the wheel well of the Jeep. It is held in with several plastic rivets, so use a thin, flat screwdriver to pry them loose and slide the entire liner out.

Disconnecting the Filler Neck

Use a flat-head screwdriver to disconnect the hose clamp from the filler neck and pull off the fuel hose.

Disconnecting the Tank Vent Hose and Fuel Pump Power Supply

Use a flat-head screwdriver to remove the clip that holds the vent hose to the gas tank. Pull the hose off the tank, then disconnect the quick disconnect of the power supply for the fuel pump. Slide up the red locking clip and pull apart the quick-connect wiring harness.

Removing the Tank Straps

Place some wood blocks under the gas tank to prevent it from dropping, or use a hydraulic floor jack with slight pressure on the tank to keep it from falling. Use a ratchet with an extension to unbolt the strap from the frame.

Once you have removed these components, you can continue with the next steps to replace the fuel pump, which are outlined in the sources.

Disconnect the fuel return and pressure lines from the fuel pump module

Disconnecting the fuel return and pressure lines from the fuel pump module is a crucial step in replacing the fuel pump in a 2002 Jeep Grand Cherokee. Here is a detailed guide on how to perform this task:

Before beginning, it is important to note that the fuel system is under constant pressure, even with the engine off. Therefore, before servicing the fuel pump module, the fuel system pressure must be released. This can be done by performing the Fuel System Pressure Release Procedure. Once the pressure is released, proceed to the next steps:

Clean the Work Area:

Thoroughly wash and clean the area around the pump module to prevent contaminants from entering the tank. This step is important to avoid any dirt or debris from entering the fuel system, which could cause issues with the fuel pump or engine.

Locate the Fuel Return and Pressure Lines:

The fuel return and pressure lines are connected to the fuel pump module fittings. These lines are responsible for returning excess fuel to the tank and maintaining the correct fuel pressure in the system.

Disconnect the Lines:

To disconnect the fuel return and pressure lines, refer to the Quick-Connect Fittings procedures. These lines are usually secured with clamps or clips, which need to be carefully released. It is important to be gentle during this process to avoid damaging the fittings or the lines themselves.

Release the Locknut:

The fuel pump module is secured to the fuel tank with a locknut. To remove the module, the locknut must be released. Install a special tool, such as Tool 6856, to the locknut and remove it. Once the locknut is removed, the fuel pump module will spring up slightly.

Remove the Fuel Pump Module:

After disconnecting the lines and releasing the locknut, the fuel pump module can be carefully removed from the fuel tank. It is important to handle the module with care to avoid damaging any components.

By following these steps, you can successfully disconnect the fuel return and pressure lines from the fuel pump module in a 2002 Jeep Grand Cherokee. Remember to work in a well-ventilated area and take the necessary safety precautions when working with the fuel system.

Remove the old fuel pump and install the new one

To remove the old fuel pump and install a new one in your 2002 Jeep Grand Cherokee, follow these steps:

Firstly, make sure to perform the Fuel System Pressure Release Procedure and drain the fuel tank. It is also recommended to work in a well-ventilated area and to avoid any sources of heat or flame. Disconnect the negative battery terminal, and use wheel chocks and jack stands to support the rear of your Jeep, ensuring it is secure and stable.

Next, remove the left (driver's side) rear inner fender cover with a Phillips-head screwdriver to access the fuel filler neck. Disconnect the hose clamp from the filler neck with a flat-head screwdriver and pull off the fuel hose. Then, disconnect the tank vent hose and fuel pump power supply by removing the clip holding the vent hose to the gas tank. Pull off the hose and disconnect the power supply's quick disconnect.

Now, place wood blocks under the gas tank to prevent it from dropping, or use a hydraulic floor jack to support it gently. Remove the tank straps with a ratchet and extension, and lower the tank slightly with the jack. Disconnect the fuel line from the top of the fuel pump by squeezing and pulling it off. Once the fuel line is disconnected, you can completely remove the tank from under the Jeep.

The fuel pump is secured with a locking ring. Turn the ring counterclockwise to loosen and remove it, then pull out the old fuel pump. Now, you are ready to install the new fuel pump.

Firstly, apply some Vaseline around the base of the new fuel pump to create a watertight seal. Carefully insert the new pump, being cautious not to damage the float and fuel level gauge. Once the pump is seated, apply pressure to ensure it is secure and replace the locking ring, turning it clockwise. Move the tank back under the Jeep, raising it about a foot from its final position. You will need a new fuel line retaining clip to connect the fuel line to the new pump. Reconnect the fuel line, raise the tank, and reconnect the tank straps. If they appear worn, use new straps. Reconnect the fuel pump power supply and vent hose, and reconnect the fuel line to the filler neck.

Finally, reinstall the inner fender wall, start your Jeep, and check for any leaks. If there are no leaks, lower the Jeep, and you're done!

Reconnect the fuel line to the new fuel pump and check for leaks

Now that you have installed the new fuel pump, it is time to reconnect the fuel line. First, reach back and re-attach the fuel line to the new fuel pump. You will need a new fuel line retaining clip for this. Once you have reconnected the fuel line, you can raise the tank back into position and reconnect the tank straps. If the straps appear worn or questionable, use two new tank straps.

Next, reconnect the fuel pump power supply and the venting hose. Reconnect the fuel line to the filler neck and reattach the inner fender wall. Now, start your Jeep and check for leaks. If there are no leaks, lower the Jeep and you are done.

If you notice any leaks, turn off the engine and try to identify the source of the leak. Make sure all connections are secure and that there is no damage to the fuel line or tank. If the leak is coming from the fuel tank, you may need to replace the tank gasket.

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