how to fix rough idle on Skoda Octavia NFL (2020-Present)

Solution

1. Preparation

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

2. Clean or Replace Spark Plugs

• Remove the ignition coils using a socket set.
• Extract the spark plugs using a spark plug socket.
• Inspect the spark plugs for wear; replace if necessary.
• Clean the spark plug contacts with a wire brush or replace with new plugs.
• Reinstall spark plugs and ignition coils, ensuring they are secure.

3. Inspect and Clean Throttle Body

• Remove the air intake duct to access the throttle body.
• Use a throttle body cleaner and a soft cloth to clean the throttle plate and surrounding areas.
• Ensure the throttle plate moves freely without obstruction.
• Reassemble the air intake duct securely.

4. Check and Replace Fuel Filter

• Locate the fuel filter; refer to the vehicle's service manual for specific location.
• Relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
• Disconnect the fuel lines from the filter using the appropriate tools.
• Install the new fuel filter, ensuring correct orientation and secure connections.

5. Idle Air Control Valve Inspection

• Locate the idle air control valve (IAC) as specified in the service manual.
• Remove the IAC and inspect for carbon buildup; clean if necessary or replace if faulty.
• Reinstall the IAC and ensure all electrical connections are secure.