Here's a general outline of the process. This is not a complete, step-by-step guide, and you should consult a repair manual specific to your 1991 Jeep Cherokee Laredo for detailed instructions and safety precautions. Improperly handling fuel can be dangerous.
Safety First:
* Disconnect the battery's negative terminal. This is crucial to prevent sparks.
* Work in a well-ventilated area. Fuel vapors are flammable and hazardous.
* Wear safety glasses and gloves.
* Have a fire extinguisher nearby.
Steps (General Outline):
1. Prepare the vehicle: Secure the vehicle on jack stands (never work under a vehicle supported only by a jack).
2. Drain the fuel tank: This is highly recommended to minimize fuel spillage and make the tank lighter to handle. Use a siphon pump designed for fuel.
3. Disconnect the fuel lines: Carefully disconnect the fuel lines from the fuel tank. You'll likely need fuel line disconnect tools to avoid damage. Have rags ready to absorb any spilled fuel.
4. Disconnect the electrical connector: Disconnect the electrical connector to the fuel pump.
5. Lower the fuel tank: This usually involves removing straps or bolts securing the tank. You may need to disconnect the fuel tank sending unit (fuel level sensor) as well. Support the tank as you lower it to prevent damage.
6. Access the fuel pump: The fuel pump is typically accessed through a cover on the top of the fuel tank or may be attached directly to the fuel sending unit.
7. Remove the old fuel pump: Carefully remove the old fuel pump assembly, noting the orientation and any gaskets or seals.
8. Install the new fuel pump: Install the new fuel pump, ensuring it's correctly seated and oriented. Replace any gaskets or seals.
9. Reassemble: Carefully raise the fuel tank back into place, reconnect the fuel lines, electrical connector, and fuel sending unit. Secure the tank with the straps or bolts.
10. Reconnect the battery: Reconnect the battery's negative terminal.
11. Check for leaks: Check for any fuel leaks around the tank and fuel lines.
12. Prime the fuel system (if necessary): Some vehicles require priming the fuel system after a fuel pump replacement. Your repair manual will detail this.
13. Start the engine: Start the engine and check for proper operation.
Important Considerations:
* Repair Manual: A factory service manual or a reputable aftermarket repair manual specific to your 1991 Jeep Cherokee Laredo is essential. It will provide detailed diagrams, torque specifications, and crucial safety information.
* Fuel Pump Assembly: Often, the entire fuel pump assembly (including the sending unit) is replaced as a single unit.
* Gaskets and Seals: Replace all gaskets and seals during reassembly to prevent leaks.
* Professional Help: If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. This is not a beginner-level repair.
This information is for guidance only. Always consult a repair manual and prioritize safety when working with fuel systems. Incorrect installation can lead to serious problems, including fire.
