Honda CR-V Sixth Generation (2023-present) engine idles rough when cold what should I check

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on it.

2. Inspect Air Intake System

• Remove the air intake duct and inspect the air filter. Replace if dirty.
• Check for any cracks or loose connections in the intake hoses.
• Reinstall the air intake duct securely.

3. Check Coolant Temperature Sensor

• Locate the coolant temperature sensor on the engine.
• Disconnect the electrical connector and remove the sensor using a socket wrench.
• Test the sensor with a multimeter for proper resistance values at various temperatures. Replace if faulty.

4. Examine Ignition System

• Remove the spark plugs using a spark plug socket.
• Inspect the spark plugs for wear or fouling and replace if necessary.
• Test each ignition coil with a multimeter for proper resistance; replace any faulty coils.

5. Inspect Fuel Injectors

• Connect a fuel pressure gauge to the fuel rail and turn the ignition on (do not start the engine) to check the fuel pressure.
• If pressure is low, inspect the fuel pump and fuel filter for issues.
• If injectors are suspected to be clogged, remove and clean them or replace them if necessary.

6. Clean the Idle Air Control Valve (IAC)

• Locate the IAC valve, usually mounted on the throttle body.
• Disconnect the electrical connector and remove the IAC valve.
• Clean the valve and its port with throttle body cleaner and reinstall.