Tools You'll Need:
* Socket set: You'll likely need a socket and ratchet to remove the IAC valve mounting screws. The size will vary but is usually a small size (e.g., 8mm or 10mm).
* Screwdriver: Possibly a Phillips head or Torx screwdriver, depending on the type of screws holding the valve in place.
* New IAC valve: Make sure you get the correct replacement part for your specific 318 engine.
* Shop rags or paper towels: To keep things clean.
* Possibly a battery terminal cleaner: For cleaning the battery terminals, which can help avoid issues after replacing the IAC.
* Optional: Throttle body cleaner: Cleaning the throttle body while you have access is a good idea for preventative maintenance.
Procedure:
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 Valve: The IAC valve is usually located on the throttle body, a butterfly-shaped valve at the intake manifold. It's a small, rectangular or cylindrical component with an electrical connector plugged into it.
3. Disconnect the Electrical Connector: Carefully unplug the electrical connector from the IAC valve.
4. Remove the IAC Valve Mounting Screws: Use your socket and ratchet (or screwdriver) to carefully remove the screws holding the IAC valve in place. There are usually two screws.
5. Remove the IAC Valve: Gently remove the old IAC valve from the throttle body. Take note of its orientation – some have a slightly different shape or markings that need to be facing a specific direction when reinstalling.
6. Clean the Throttle Body (Optional but Recommended): While you have access, use a throttle body cleaner to clean the throttle body. This will remove any buildup of carbon deposits, which can affect performance. Follow the cleaner's instructions carefully. Let it dry completely.
7. Install the New IAC Valve: Carefully install the new IAC valve into the throttle body, ensuring it's oriented correctly.
8. Secure the IAC Valve: Tighten the mounting screws to the manufacturer's specified torque (check your repair manual). Don't overtighten.
9. Reconnect the Electrical Connector: Plug the electrical connector back onto the new IAC valve.
10. Reconnect the Battery: Reconnect the battery's negative (-) terminal, then the positive (+) terminal.
11. Start the Engine: Start the engine and listen for any unusual noises. The idle should be smooth and consistent. If not, there might be another underlying issue.
Important Considerations:
* Repair Manual: Always refer to a repair manual specific to your 1996 Dodge Ram 1500 with a 318 engine. This will provide detailed diagrams, torque specifications, and other important information.
* Professional Help: If you're uncomfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic.
* Computer Reset: Some vehicles may require a computer reset after replacing the IAC valve. Your repair manual will indicate whether this is necessary. Often disconnecting the battery for a short time achieves this.
This guide provides a general overview. The specifics of the repair may differ slightly depending on your vehicle's exact configuration. Always prioritize safety and consult your repair manual for detailed instructions.
