Safety First:
* Disconnect the battery's negative terminal. This prevents accidental electrical shorts.
* Work in a well-ventilated area. Gasoline fumes are highly flammable and toxic.
* Wear safety glasses and gloves.
* Have a fire extinguisher nearby.
* Never smoke near the fuel tank.
* Use appropriate tools. Improper tools can damage components.
General Steps (Specifics vary by year and model):
1. Vehicle Preparation: Raise and securely support the vehicle. Locate the fuel tank access panel (usually underneath the vehicle).
2. Drain the Fuel Tank: This is crucial to minimize the amount of fuel you're working with. Use a fuel siphon or drain valve.
3. Access the Fuel Pump: Remove the access panel to expose the fuel pump. This often involves removing bolts, clips, or other fasteners. The fuel pump is usually housed in a module within the tank.
4. Disconnect Electrical Connections: Carefully disconnect the electrical connectors leading to the fuel pump module. Take photos or make notes to ensure you reconnect them correctly.
5. Disconnect Fuel Lines: There will be at least one, and possibly two fuel lines connected to the module. These should have some type of quick-disconnect fitting or clamping mechanism. Have a container ready to catch any remaining fuel. This step requires extreme caution.
6. Remove the Fuel Pump Assembly: This is the most challenging part. There may be retaining clips, bolts, or a retaining ring holding the pump module in place. You may need to use special tools to remove it (consult your repair manual).
7. Inspect the Fuel Pump and Surrounding Components: Once removed, inspect the old pump for any obvious damage that might indicate the cause of the failure. Inspect the sending unit (if part of the assembly) for any issues.
8. Installation (Reverse Procedure): Installation is the reverse of removal. Carefully ensure all electrical connectors and fuel lines are securely reconnected and the module is firmly seated. Tighten any bolts or clips to manufacturer specifications.
9. Lower Vehicle: Lower the vehicle safely.
Important Considerations:
* Year and Model Specifics: The exact procedure varies significantly between Fiesta years and models. A repair manual for your specific vehicle is absolutely essential.
* Tools: You'll likely need various tools, including sockets, wrenches, screwdrivers, and possibly specialized tools for the pump removal.
* Replacement Parts: Source a compatible fuel pump replacement from a reputable supplier. Using an incorrect part can lead to further problems.
* Professional Help: If you're not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. Fuel system work is not trivial and mistakes can have serious consequences.
This is a dangerous job with potential for serious injury and damage. Do not attempt this unless you're confident in your abilities and have the proper tools and safety equipment. Referencing your vehicle's repair manual is absolutely critical for safe and successful completion.
