This is a general outline; specific steps might vary slightly depending on your Focus's trim level and engine. Always consult a repair manual specific to your vehicle's year, make, model, and engine for detailed instructions and diagrams.
Safety First:
* Disconnect the negative battery terminal. This is crucial to prevent sparks and electrical hazards.
* Work in a well-ventilated area. Fuel vapors are flammable and potentially explosive.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
* Use appropriate tools. You'll need a fuel pump removal tool (often specialized), various sockets, wrenches, and possibly a fuel line disconnect tool.
General Steps (Consult your repair manual for specifics):
1. Drain the fuel tank (partially or completely): This makes the job significantly easier and safer. You can siphon the gas out using a siphon pump. Be extremely careful not to spill any fuel.
2. Remove the rear seat: This usually involves removing some trim pieces and unlatching the seatbacks. The access panel to the fuel pump is typically located under the rear seat.
3. Access the fuel pump: Locate the access panel to the fuel tank. It might require removing more interior trim pieces.
4. Disconnect the electrical connector: Carefully unplug the electrical connector from the fuel pump.
5. Disconnect the fuel lines: You'll need to disconnect the fuel feed and return lines. Use appropriate clamps or tools to avoid damaging the lines. Have rags ready to absorb any spilled fuel. Some newer vehicles have quick disconnect fittings that make this easier, while others might require specialized tools.
6. Remove the fuel pump retaining ring: This is usually done with a specialized fuel pump removal tool. The ring holds the pump assembly in place.
7. Remove the fuel pump assembly: Once the ring is off, carefully lift out the entire fuel pump assembly.
8. Install the new fuel pump: Reverse the removal process, ensuring all parts are properly seated and connected. Use new gaskets or O-rings as needed. Pay close attention to the orientation of the pump.
9. Reconnect the fuel lines and electrical connector: Make sure everything is securely connected.
10. Reconnect the retaining ring: Secure the assembly firmly.
11. Replace the access panel and rear seat: Reassemble everything in the reverse order of removal.
12. Reconnect the negative battery terminal.
13. Prime the fuel system: Some vehicles require priming the fuel pump after installation. Check your repair manual for instructions. This might involve turning the ignition key on and off a few times before starting the engine.
14. Start the engine and check for leaks: Look for any fuel leaks around the fuel lines and pump after starting the engine.
Important Notes:
* Fuel pressure: The fuel system operates under pressure. Improper handling can result in fuel spraying.
* Fuel pump sock: The fuel pump usually has a sock or filter that should be inspected and replaced if necessary.
* Fuel pump module: The fuel pump is often part of a larger module that contains other components. The entire module might need replacing.
This process is significantly more involved than a simple description. Again, consult a repair manual specific to your 2006 Ford Focus before attempting this repair. Improper installation can lead to vehicle damage or injury. If you are unsure about any step, seek professional help.
