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Derrick
Derrick, ASE Certified Technician
Category: Car
Satisfied Customers: 923
Experience:  A.S.-Automotive Analysis A6-Electrical A8/L1-Engine Performance Cert., CA Chrysler/Jeep/Dodge Tech
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how to replace fuel pump in 1999 jeep cherokee laredo

Customer Question

No Comment Added
Submitted: 6 years ago.
Category: Car
Expert:  Derrick replied 6 years ago.

Hi there,

Below are the directions on how to replace the fuel pump as well as a few pictures to help you out:

REMOVAL

WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF) BEFORE SERVICING FUEL PUMP MODULE, FUEL SYSTEM PRESSURE MUST BE RELEASED.

  1. Perform Fuel System Pressure Release Procedure.
  2. Drain fuel tank and remove tank.
  3. Thoroughly wash and clean area around pump module to prevent contaminants from entering tank.
  4. Disconnect fuel return and pressure lines from fuel pump module fittings
  5. The plastic fuel pump module locknut is threaded onto fuel tank, use a flat head screwdriver and a hammer to tap it off counter-clockwise. The fuel pump module will spring up slightly after locknut is removed.
  6. Remove module from fuel tank

INSTALLATION

CAUTION: Whenever fuel pump module is serviced, module gasket must be replaced.

  1. Thoroughly clean locknut threads and mating fuel tank threads. Use a soap/water solution. Do not use carburetor cleaner to clean threads.
  2. Using new gasket, position fuel pump module into opening in fuel tank.
  3. Apply clean water to locknut threads.
  4. Position locknut over top of fuel pump module.
  5. Rotate module until indexing arrow at top of module is pointed toward rear of vehicle. Align arrow to tick mark on top of fuel tank. This step must be done to prevent float/float rod assembly from contacting sides of fuel tank.
  6. Place locknut over module
  7. Tighten locknut with a hammer and flathead screwdrivers.
  8. Connect fuel return and pressure lines to fuel pump module fittings
  9. Install fuel tank.

I hope this helps! Let me know if you have any more questions!

Customer: replied 6 years ago.
How to remove tank to replace fuel pump?
Expert:  Derrick replied 6 years ago.

Oh, sorry!

Here are the directions on how to remove your fule tank as well as a few pictures to help you out:

  1. Release fuel system pressure
  2. Disconnect negative battery cable at battery.
  3. Raise and support vehicle.
  4. Working from front of fuel tank, loosen clamp at fuel vent hose at fuel tank end of hose. Remove hose at tank fitting.

 

  1. Remove rear tow hooks (if equipped)
  2. Remove optional trailer hitch (if equipped)
  3. Remove fuel tank-to-rear bumper fascia clips
  4. Remove fuel tank heat shield mounting bolts

    CAUTION: To protect fuel tank from exhaust heat, shield must re-installed after tank installation.

    WARNING: PLACE SHOP TOWEL AROUND FUEL LINES TO CATCH ANY EXCESS FUEL.

 

  1. Disconnect fuel pressure line at fuel filter/fuel pressure regulator
  2. Disconnect EVAP canister vent line near front of tank
  3. Disconnect fuel pump module electrical connector (pigtail harness) near front of tank. Harness connector is clipped to body.
  4. Cut and discard tie strap supporting rear axle vent hose to tank vent hose
  5. Remove clamp on axle vent hose at rear axle.
  6. Remove vent hose from fitting at rear axle.
  7. Loosen fill and vent hose clamps at body. Disconnect fill and vent hoses at filler tube assembly.
  8. Place hydraulic jack to bottom of fuel tank.
  9. Remove tank-to-frame mounting bolts
  10. Carefully lower tank until clear of vehicle. Place tank on floor.
  11. If necessary, remove two fuel tank strap nuts

 

I hope this helps! Let me know if you have any more questions!

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