NOTE: Disconnect the negative battery terminal before starting the replacement process to avoid any electrical accidents.
1. Locate the IACV:
- The IACV is usually mounted on the throttle body of the engine.
2. Remove Air Filter Housing:
- Locate the air filter housing (usually near the IACV).
- Remove the bolts or clips that secure the air filter housing.
- Disconnect any hoses or electrical connectors attached to the air filter housing, and set it aside.
3. Disconnect IACV:
- Disconnect the electrical connector from the IACV.
4. Remove Mounting Bolts:
- Locate the bolts that secure the IACV to the throttle body.
- Remove these bolts and set them aside.
5. Remove Old IACV:
- Carefully pry the old IACV off the throttle body.
- Be careful not to damage the gasket between the IACV and the throttle body.
6. Clean IACV Seat:
- Clean the IACV seat on the throttle body using a carburetor cleaner or similar product.
- Ensure that the seat is free of any dirt or debris.
7. Install New Gasket:
- Check the old gasket, replace it if necessary with a new one.
- Ensure that the new gasket is properly seated in place.
8. Install New IACV:
- Carefully position the new IACV onto the throttle body, making sure that the gasket is properly aligned.
- Secure the IACV using the mounting bolts previously removed.
9. Reconnect IACV:
- Reconnect the electrical connector to the IACV.
10. Reinstall Air Filter Housing:
- Reinstall the air filter housing, reconnect any disconnected hoses or electrical connectors, and secure it using the bolts or clips.
11. Reconnect Battery:
- Reconnect the negative battery terminal.
12. Start Engine and Test:
- Start the engine and allow it to reach normal operating temperature.
- Check for any leaks or unusual engine behavior.
13. Reset Idle Learn:
- Some vehicles require resetting the idle learn procedure after replacing the IACV. Refer to your vehicle's service manual for specific instructions on this.
After completing all the steps, double-check all connections and ensure the IACV is secure. Test drive the vehicle to make sure the idle is smooth and stable. If the idle is still erratic, you may need to have the vehicle's computer (PCM) reprogrammed or checked by a professional.
