my Volkswagen Passat B8 (2015-2022) engine stutters when accelerating

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative terminal of the battery.
• Allow the engine to cool down completely.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the ignition coil cover by unscrewing it.
  2. Disconnect the ignition coils from the spark plugs.
  3. Remove the spark plugs using a spark plug socket.
  4. Inspect the spark plugs for wear and replace them if necessary.
  5. Install new spark plugs, tightening them to manufacturer specifications (typically around 20 Nm).
  6. Reconnect the ignition coils and cover.

3. Check and Replace Fuel Filter

• Sub-steps:
  1. Locate the fuel filter, typically near the fuel tank or in-line with the fuel lines.
  2. Relieve fuel system pressure by removing the fuel pump fuse and cranking the engine.
  3. Disconnect fuel lines carefully (use safety goggles).
  4. Remove and replace the fuel filter with a new one.
  5. Reconnect the fuel lines securely.
  6. Restore power by replacing the fuel pump fuse.

4. Inspect and Replace Ignition Coils

• Sub-steps:
  1. Remove the ignition coils from the engine by unscrewing them.
  2. Inspect the coils for cracks or signs of wear.
  3. Replace any faulty coils with new ones.
  4. Reinstall the ignition coils and ensure they are seated properly.

5. Final Checks

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Start the engine and allow it to idle for a few minutes.
  3. Check for any leaks in the fuel system.
  4. Test drive the vehicle to ensure the stuttering issue is resolved.