Here's a general outline. Specific steps may vary slightly depending on your Cherokee's trim level and engine (4.0L or other). Consult a repair manual specific to your vehicle year and engine for detailed instructions and diagrams. This is a simplified overview and shouldn't be considered a complete guide.
1. Preparation:
* Safety First: Disconnect the negative battery terminal. Allow the fuel system to depressurize – this can take some time. You can also use a fuel pressure gauge to check if it's safely depressurized.
* Gather Tools: You'll need jack stands, a jack, socket wrenches (various sizes), screwdrivers (Phillips and flathead), fuel line disconnect tools, a fuel pump strainer (often sold with the pump), safety glasses, gloves, and possibly a fuel pump removal tool (depending on the access). A shop manual is invaluable.
* Obtain the New Fuel Pump: Ensure you get the correct fuel pump for your specific Jeep Cherokee model and engine.
2. Accessing the Fuel Pump:
* Lower the Fuel Tank: This is the most labor-intensive part. You'll likely need to:
* Raise the vehicle safely using jack stands.
* Locate the fuel tank straps: These are usually at the front and rear of the tank.
* Disconnect the fuel tank straps: This often involves removing nuts and bolts.
* Carefully lower the fuel tank: Support the tank as you lower it to prevent damage. You might need to use a jack or support straps. The tank is usually heavy.
* Alternative (Sometimes Possible): On some Cherokees, you might be able to access the fuel pump through a dedicated access panel in the bed of the truck. Consult your repair manual to see if this is an option for your vehicle.
3. Fuel Pump Replacement:
* Disconnect the Fuel Lines: Carefully disconnect the fuel lines using appropriate tools. Be prepared for some fuel spillage – use rags to absorb it. Mark the lines clearly to ensure correct reassembly.
* Disconnect the Electrical Connector: Unplug the electrical connector to the fuel pump.
* Remove the Fuel Pump Assembly: This usually involves removing a retaining ring or bolts. You may need a special tool.
* Replace the Fuel Filter (Strainer): This is typically integrated into the fuel pump assembly. Install the new strainer/filter.
* Install the New Fuel Pump: Carefully install the new fuel pump, ensuring it sits correctly.
* Reassemble: Reinstall the retaining ring or bolts.
* Reconnect the Electrical Connector and Fuel Lines: Reconnect everything, ensuring the fuel lines are properly seated and the electrical connector is firmly attached.
4. Reinstallation:
* Raise the Fuel Tank: Carefully raise the fuel tank back into its position.
* Reconnect the Tank Straps: Securely tighten the fuel tank straps.
* Lower the Vehicle: Carefully lower your vehicle from the jack stands.
* Reconnect the Battery Terminal: Reconnect the negative battery terminal.
5. Priming the Fuel System (Very Important):
* After reassembly, you'll need to prime the fuel system. This is critical to get fuel to the engine. The method may vary, check your repair manual for the correct procedure for your model. It often involves turning the ignition key on and off several times (without starting the engine) to allow the pump to build pressure.
Important Considerations:
* Fuel Pressure: After the replacement, check the fuel pressure to ensure it's within specifications.
* Repair Manual: This is essential. It will provide detailed instructions, diagrams, and torque specifications to avoid damage.
* Safety: Work in a well-ventilated area, avoid sparks, and use proper safety equipment.
* Professional Help: If you're uncomfortable performing this repair yourself, it's best to take it to a qualified mechanic. This is not a beginner's job.
This is a general overview. Incorrect procedures could lead to damage to your vehicle or even injury. Always consult a repair manual specific to your 1994 Jeep Cherokee before attempting this repair.
