how to check for a misfire in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Disconnect the ignition coil connectors.
  3. Unbolt and remove the ignition coils.
  4. Remove the old spark plugs using a spark plug socket.
  5. Inspect the spark plugs for wear; replace if necessary with OEM parts (specify gap if applicable).
  6. Install new spark plugs and torque to manufacturer specifications (typically 13 lb-ft).
  7. Reinstall ignition coils and reconnect connectors.

3. Check and Replace Ignition Coils

• Sub-steps:
  1. If misfire codes indicate specific cylinders, inspect corresponding ignition coils.
  2. Test ignition coils with a multimeter for proper resistance values (refer to service manual for specifications).
  3. If faulty, replace with new ignition coils.
  4. Reconnect all connectors and ensure secure seating.

4. Inspect and Test Fuel Injectors

• Sub-steps:
  1. Use a noid light to check for injector signal when the engine is cranked.
  2. If no signal, diagnose wiring or ECU issues.
  3. For injectors suspected of being clogged, consider using a fuel injector cleaning kit or replacing them if necessary.
  4. Reinstall any components removed during testing.