Here's a general overview. Specific steps might vary slightly depending on the exact model of your Cherokee (e.g., Laredo, Sport, etc.). Always consult a repair manual specific to your vehicle's year and model for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
1. Preparation:
* Safety First: Disconnect the negative battery cable. Allow the system to sit for a few minutes to discharge any remaining electricity.
* Gather Tools: You'll need various sockets, wrenches (metric), screwdrivers, a fuel pump removal tool (often a specialized socket), safety glasses, gloves, jack stands, jack, and possibly a fuel line disconnect tool. A fuel pressure gauge is helpful but not strictly necessary.
* Gather Parts: New fuel pump, fuel filter (it's a good idea to replace this while you're in there), new fuel pump gasket(s), and any other necessary replacement seals or clips.
* Drain Fuel: If possible, partially drain the fuel tank to reduce the amount of fuel you'll be working around. This reduces the risk of spills and makes the job easier.
2. Accessing the Fuel Pump:
* Lower the Fuel Tank: This is usually the most challenging part. You'll likely need to:
* Jack up the vehicle securely and place it on jack stands.
* Locate the fuel tank access panel: This is typically under the vehicle, sometimes near the rear axle. You might need to remove some components to access it (consult your repair manual).
* Disconnect the fuel lines: This requires extreme care. Use a fuel line disconnect tool to avoid damaging the lines. Have rags or shop towels ready to absorb any spilled fuel.
* Disconnect the electrical connector: This is the wiring harness to the fuel pump.
* Disconnect the fuel tank sending unit: This unit measures fuel level.
* Lower the fuel tank: Some Cherokees require the use of straps and careful maneuvering to lower the tank. Others have access panels which allow removing the pump without dropping the tank. Refer to your repair manual for specifics.
3. Replacing the Fuel Pump:
* Remove the old fuel pump: This will often involve removing the access cover to the fuel pump and using a special fuel pump removal tool.
* Install the new gasket: Ensure a new gasket is properly seated.
* Install the new fuel pump: Follow the instructions that come with your new fuel pump.
* Reinstall the access cover: Tighten all screws and fasteners securely.
4. Reassembly:
* Raise the fuel tank: Carefully raise the fuel tank back into its position.
* Reconnect the fuel lines, electrical connector, and sending unit: Ensure everything is securely connected and free of leaks.
* Reconnect the battery cable.
* Check for Leaks: Carefully inspect all connections for leaks.
* Prime the fuel system: This often involves turning the ignition key on and off several times (without starting the engine) to allow the pump to prime. Some vehicles require cycling the ignition switch several times before starting. Check your repair manual.
* Start the engine: Listen for any unusual noises from the fuel pump and check for leaks.
Important Notes:
* Repair Manual: A repair manual specific to your 1992 Jeep Cherokee is absolutely essential for detailed instructions, torque specifications, and diagrams.
* Fuel Safety: Work in a well-ventilated area, away from open flames or sparks. Use proper safety equipment.
* Professional Help: If you're not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improperly installed fuel pumps can lead to serious safety hazards.
This is a simplified overview. Improper installation can cause serious damage to your vehicle or even injury to yourself. Always consult a repair manual specific to your year and model of Jeep Cherokee before attempting this repair.
