what does it mean if my Volkswagen Golf MK6 (2009-2014) has a rough idle?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the engine is cool.
• Disconnect the battery to prevent electrical issues during repairs.

2. Replace Spark Plugs

• Remove the engine cover if applicable.
• Use a spark plug socket and ratchet to unscrew and remove the old spark plugs.
• Check the gap on the new spark plugs according to the manufacturer's specifications.
• Install new spark plugs by hand-tightening, then torque to the specified value (usually around 15-20 Nm).
• Reattach the engine cover.

3. Inspect and Replace Air Filter

• Open the air filter housing by unclipping or unscrewing it.
• Remove the old air filter and check for signs of dirt and debris.
• Install a new air filter, ensuring it fits snugly in the housing.
• Close the air filter housing securely.

4. Clean Throttle Body

• Locate the throttle body and detach the intake duct.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and surrounding areas.
• Reassemble the intake duct securely.

5. Check for Vacuum Leaks

• Inspect hoses for cracks or disconnections.
• Replace any faulty hoses.
• Use a smoke machine to detect leaks if necessary.