why does my Volkswagen Golf MK7.5 (2020-Present) engine misfire at idle?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before starting repairs.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coils from the spark plugs.
  3. Use a spark plug socket to remove the old spark plugs.
  4. Inspect the spark plug gap and replace with new spark plugs, ensuring correct gap settings (typically around 0.028-0.032 inches).
  5. Torque the new spark plugs to the manufacturer’s specifications (usually around 15-20 ft-lbs).

3. Check and Replace Ignition Coils

• Sub-steps:
  1. Remove the ignition coils from the spark plugs.
  2. Inspect coils for cracks, corrosion, or signs of failure.
  3. If necessary, replace faulty ignition coils with new ones, ensuring they are correctly seated and connected.
  4. Reconnect the battery.

4. Clean or Replace Fuel Injectors

• Sub-steps:
  1. Remove the fuel injector connector and the fuel rail if necessary.
  2. Use a fuel injector cleaning kit or replace with new injectors if they are clogged or failing.
  3. Reinstall the fuel rail and connectors, ensuring no leaks.

5. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Replace damaged hoses as required.
  3. Verify that all connections are secure.