Skoda Octavia NFL (2020-Present) engine is misfiring how to fix it

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool down before starting work.

2. Replace Spark Plugs

• Remove the ignition coil covers if applicable.
• Use a socket wrench to carefully remove each spark plug.
  • Tools Required: Socket set, torque wrench.
  • Safety Warning: Ensure the engine is cool to avoid burns.
• Inspect the old spark plugs and clean the area around each hole.
• Install new spark plugs, ensuring the gap is correctly set to manufacturer specifications.
• Torque the spark plugs to the specifications provided in the vehicle's service manual.

3. Inspect and Replace Ignition Coils

• Remove the ignition coils from each cylinder by unscrewing them from their mounting points.
• Check for any visible damage or wear on the coils.
• If any coil is faulty, replace it with a new one.
• Reinstall the ignition coils securely and reconnect the electrical connections.

4. Fuel System Check

• Connect a fuel pressure gauge to the fuel rail.
• Start the engine and check for proper fuel pressure; compare it to the specifications in the service manual.
• If the pressure is low, inspect the fuel pump and filter for any blockages.
• Replace the fuel filter if it is clogged.

5. Clean or Replace Fuel Injectors

• If fuel injectors are suspected to be clogged, use a fuel injector cleaning kit following the manufacturer's instructions.
• If cleaning does not resolve the issue, consider replacing the injectors with new ones.