how to fix a misfiring engine in Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on the electrical components.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if present.
• Disconnect spark plug wires or ignition coil connectors.
• Use the spark plug socket to remove old spark plugs.
• Inspect old spark plugs for wear; replace with new spark plugs if necessary.
• Apply a small amount of dielectric grease to the new spark plug threads.
• Torque new spark plugs to the manufacturer’s specifications (typically 13-16 lb-ft for Honda).

3. Inspect and Replace Ignition Coils

• Tools Required: Socket set, torque wrench.
• Remove ignition coils from the spark plug wells after disconnecting their electrical connectors.
• Inspect coils for cracks or carbon tracking; replace any faulty coils with new ones.
• Torque new ignition coils to manufacturer specifications (typically 7-9 lb-ft).

4. Check and Replace Fuel Injectors (if needed)

• Tools Required: Fuel injector puller, socket set.
• Remove the fuel rail by disconnecting the fuel line and any electrical connectors.
• Carefully pull out the fuel injectors; inspect for clogs or leaks.
• Replace any faulty injectors with new ones.
• Reinstall the fuel rail and reconnect all lines and connectors.

5. Clear Codes and Reconnect Battery

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear any stored error codes.
• Start the engine and monitor for misfire symptoms.