why does my Honda Civic 11th Generation (2022-Present) sound like it's misfiring?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connectors.
  3. Remove the ignition coils using a socket wrench.
  4. Extract the spark plugs using a spark plug socket.
  5. Inspect the old spark plugs for wear and replace with new ones if necessary (use OEM or equivalent).
  6. Reinstall the spark plugs and torque them to the manufacturer’s specification (typically around 13-16 lb-ft).

3. Test and Replace Ignition Coils (if necessary)

• Sub-steps:
  1. Use a multimeter to test the resistance of each ignition coil (check specifications in service manual).
  2. Replace any faulty ignition coils with new units.
  3. Reconnect the ignition coils and ensure a secure fit.

4. Fuel System Inspection

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail to measure pressure.
  2. Compare readings to manufacturer specifications (typically around 40-50 psi).
  3. If pressure is low, check the fuel pump and filter for clogs or failures.
  4. Replace the fuel filter if necessary and ensure fuel pump operation is correct.

5. Reassemble and Reconnect Components

• Sub-steps:
  1. Reinstall any removed components and ensure all connections are secure.
  2. Reconnect the negative battery terminal.
  3. Clear any stored fault codes using the OBD-II scanner.