why does my Ford Mustang S650 (2024-Present) have a rough idle after warm-up

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on the vehicle.

2. Inspect and Replace Spark Plugs

• Remove the engine cover (if applicable).
• Use a socket set to remove the ignition coils.
• Extract the spark plugs using a spark plug socket.
• Inspect the spark plugs for wear or fouling, and replace them if necessary with OEM plugs.
• Reinstall the spark plugs and ignition coils, ensuring they are torqued to the manufacturer's specifications.

3. Clean or Replace the Throttle Body

• Remove the air intake duct connected to the throttle body.
• Use throttle body cleaner and a soft cloth to clean the throttle body thoroughly.
• If cleaning does not resolve the issue, consider replacing the throttle body with a new unit.

4. Test and Replace Fuel Filter (if applicable)

• Locate the fuel filter and check for any signs of clogging.
• If the fuel filter is dirty or has not been replaced in accordance with the maintenance schedule, replace it.
• Ensure proper fuel line connections and secure all fittings.

5. Reconnect Battery and Clear Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear any stored error codes.
• Start the engine and allow it to reach operating temperature.