how to resolve Honda CR-V Sixth Generation (2023-present) rough idle when cold

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

• Remove the engine cover (if applicable).
• Use a socket set to remove the spark plug wires or coils.
• Remove the spark plugs using a spark plug socket.
• Inspect the old spark plugs for wear and carbon buildup.
• Install new spark plugs by hand to avoid cross-threading, then torque to manufacturer specifications (usually around 13-15 lb-ft).
• Reattach the spark plug wires or coils.

3. Clean Throttle Body

• Locate the throttle body and remove the air intake duct.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and the interior of the throttle body.
• Ensure that the throttle plate moves freely without sticking.
• Reattach the air intake duct securely.

4. Replace Engine Coolant Temperature Sensor (if faulty)

• Locate the engine coolant temperature sensor.
• Disconnect the electrical connector and remove the sensor using a wrench.
• Install the new sensor and reconnect the electrical connector.
• Ensure the coolant level is adequate after installation.

5. Clean or Replace Fuel Injectors

• If injectors are clogged, consider using a fuel injector cleaning kit or replacing them.
• If removing injectors, ensure to relieve fuel pressure first by removing the fuel pump fuse and running the engine until it stalls.
• Remove the fuel rail with injectors attached and clean or replace as needed.
• Reinstall fuel injectors and rail, ensuring all connections are secure.