According to the Haynes Repair Manual for the 2001 Ford Excursion, you generally don't need to drop the fuel tank entirely to replace the fuel pump. However, the level of access to the pump may vary depending on the specific model or configuration of your vehicle.
Here are the steps outlined by the manual:
1. Relieve the fuel system pressure before proceeding.
2. Disconnect the battery's negative terminal for safety.
3. Locate the fuel pump access cover on the bottom of the vehicle, positioned over the fuel tank, typically held in place by screws.
4. Remove the fuel pump access cover.
5. You should be able to access the fuel pump and its components without dropping the entire fuel tank.
6. Disconnect the fuel lines and electrical connectors connected to the fuel pump.
7. Remove the securing components (bolts or a locking ring) that hold the fuel pump in place.
8. Lift the fuel pump with its integrated sending unit out of the fuel tank.
9. Inspect the fuel pump assembly for any damage or wear.
10. Replace the fuel pump or necessary components if required.
11. Reinstall the fuel pump assembly and secure it properly.
12. Reconnect the fuel lines, electrical connectors, and any other components you removed.
13. Reinstall the fuel pump access cover.
14. Reconnect the battery's negative terminal.
It's worth noting that while the fuel tank doesn't need to be fully dropped, working in close proximity to the tank may still require safety measures due to the presence of fuel and fuel vapors. Consider having the vehicle supported on jack stands or ramps and ensure you're working in a well-ventilated area to minimize any potential risks.
However, if your specific 2001 Ford Excursion model or configuration has variations in the fuel pump access or replacement procedure, it's always advisable to consult a specific repair manual or seek guidance from a professional mechanic to ensure the safety and accuracy of the fuel pump replacement.
