why does my Honda Accord 9th Generation (2013-2017) have a misfire when idling?

Learn how to diagnose and fix engine misfire issues in Honda Accord 9th Generation (2013-2017). Step-by-step guide with symptoms and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety during work.
• Allow the engine to cool completely before starting.

2. Replace Spark Plugs

1. Remove the ignition coil covers using a socket set.
2. Disconnect the electrical connectors from the ignition coils.
3. Remove the ignition coils.
4. Use a spark plug socket to remove the old spark plugs.
5. Inspect the spark plug gap and replace with new plugs if necessary (typically NGK or Denso).
6. Reinstall the new spark plugs and torque to manufacturer specifications (typically 13 lb-ft).

3. Inspect and Replace Ignition Coils (if necessary)

1. After removing the ignition coils, visually inspect them for cracks or damage.
2. Test each coil with a multimeter (specifications vary, consult manufacturer guidelines).
3. Replace any faulty coils with OEM parts.
4. Reinstall the ignition coils and reconnect the electrical connectors.

4. Clean or Replace Fuel Injectors

1. If fuel injectors are suspected to be clogged, remove them using a socket set.
2. Use a fuel injector cleaning kit or take them to a professional for ultrasonic cleaning.
3. If injectors are damaged, replace them with OEM equivalents.
4. Reinstall cleaned or new injectors and ensure proper seals are in place.

5. Inspect Vacuum Lines

1. Visually inspect all vacuum hoses for cracks, breaks, or disconnections.
2. Replace any damaged vacuum lines with correct specifications.
3. Ensure all connections are secure to prevent air leaks.