Disclaimer: Working on your vehicle carries risks. If you're not comfortable performing this repair, take it to a qualified mechanic.
Tools You'll Likely Need:
* Socket set (metric)
* Ratchet and extensions
* Screwdrivers (Phillips and possibly flathead)
* Pliers
* Torque wrench (highly recommended)
* Shop rags or paper towels
* Degreaser (optional, for cleaning)
* New IAC motor (ensure you get the correct part number for your vehicle)
General Steps (this is a general guideline and may vary):
1. Disconnect the Battery: This is crucial to prevent electrical shorts and potential damage to your vehicle's computer system. Disconnect the negative (-) terminal first.
2. Locate the IAC Motor: The IAC motor is usually located on the throttle body. The throttle body is typically found on the intake manifold, near the engine's front. It's a rectangular or butterfly-shaped housing. The IAC motor is a small electric motor usually attached to the throttle body. Consult your repair manual for the precise location.
3. Disconnect Electrical Connector: Carefully unplug the electrical connector from the IAC motor. Take note of how it connects to ensure you can reattach it correctly.
4. Remove the IAC Motor: This is where the procedure might differ significantly based on your Expedition's engine and the IAC motor's design. It might involve:
* Screws: The IAC motor might be held in place by one or more screws. Carefully remove these screws.
* Clamp or bracket: Sometimes, a clamp or bracket secures the IAC motor. Loosen this appropriately.
* Removal from throttle body: Once the fasteners are removed, the motor should gently pull away from the throttle body.
5. Clean the Throttle Body (Optional but Recommended): While you have access, use a throttle body cleaner to thoroughly clean the throttle body. This removes any carbon buildup that could affect performance. Do not use brake cleaner as it can damage the throttle body.
6. Install the New IAC Motor: Carefully install the new IAC motor, ensuring it's seated correctly. Tighten screws to the manufacturer's specified torque (consult your repair manual).
7. Reconnect the Electrical Connector: Plug the electrical connector back onto the new IAC motor.
8. Reconnect the Battery: Reconnect the battery's negative (-) terminal.
9. Start the Engine: Start your engine and check for any unusual sounds or idle issues. The idle should be smooth and consistent. If there are problems, double-check all connections and ensure the new IAC motor is correctly installed.
10. Clear any trouble codes: After installation, it's a good idea to use an OBD-II scanner to clear any trouble codes that might have been set due to the old IAC motor.
Important Considerations:
* Repair Manual: This is essential. Generic instructions can't account for all variations between vehicles.
* Torque Specifications: Use a torque wrench to tighten all fasteners to the correct specifications to avoid damage.
* Safety: Always disconnect the battery before starting any electrical work.
* Cleanliness: Keep the area clean to prevent dirt and debris from getting into the engine.
This guide provides a general overview. Refer to a reliable repair manual specific to your 2006 Ford Expedition for detailed, accurate instructions and diagrams. Improper installation can lead to further damage, so proceed with caution.
