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How to Replace a Fuel Filter in a Jeep Grand Cherokee

by Contributor

Replacing the fuel filter every 30,000 to 40,000 miles will keep the fuel system in your Jeep Grand Cherokee in good shape. A clean fuel filter helps maintain the fuel injectors and the fuel pressure regulator. Follow these instructions to replace the fuel filter in a Jeep Grand Cherokee manufactured between 2002 and 2004.

Disconnect the negative battery cable and then remove the fuel tank cap to release fuel tank pressure. Remove the fuel pump relay from the PDC. Start the engine and allow it to run until it stops. Select any injector and unplug its connector.

Connect a jumper wire from an injector terminal to the positive battery terminal. Then, connect the other jumper wire to the other battery terminal. Briefly touch the end to the negative battery terminal.

Locate the fuel filter/pressure regulator near the front of the fuel tank, mounted to the body above the rear axle. Disconnect the fuel supply, fuel return and fuel pressure lines. Remove the mounting bolts and then the fuel filter/pressure regulator.

Attach the new fuel filter/pressure regulator to the body and tighten the bolts to 30 in-lbs. Reconnect the fuel supply, fuel return and fuel pressure lines. Reconnect the negative battery cable. Start the engine of your Jeep Grand Cherokee and check for leaks.

Tip

  • The fuel filter in a Grand Cherokee made in 2005 or later is inside the fuel tank, and it is generally assumed not to need routine replacement.

Warnings

  • In Step 2, only briefly touch the jumper to the battery. You will damage the injector if you power it for more than a few seconds.
  • Do not disconnect the fuel lines until you let the pressure out of the fuel system.
  • Before starting your vehicle, be sure to wipe up any fuel that may have spilled while replacing the fuel filter.

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