my Honda Accord Eleventh Generation (2023-present) has a rough idle, what's happening?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure you have a clean workspace and proper ventilation.

2. Clean Throttle Body

• Remove the intake duct connected to the throttle body.
• Use throttle body cleaner and a soft brush to clean any carbon deposits from the throttle body.
• Reassemble the intake duct and ensure all clamps are secure.

3. Replace Spark Plugs

• Remove the ignition coil covers if applicable.
• Disconnect the ignition coils and remove the old spark plugs using a socket wrench.
• Check the gap on the new spark plugs and install them according to manufacturer's specifications.
• Reconnect the ignition coils and covers.

4. Inspect and Replace Air Filter

• Open the air filter housing and remove the old air filter.
• Inspect the housing for debris or dirt.
• Install a new air filter that meets OEM specifications.

5. Check and Repair Vacuum Leaks

• Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Replace any damaged hoses.
• Optionally, perform a smoke test to identify hard-to-find leaks.

6. Test and Adjust Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition on (but do not start the engine) and check the pressure reading.
• Compare the reading with manufacturer specifications; replace the fuel pump or filter if necessary.