What are the symptoms of a damaged throttle body?

[LaViolet]

The symptoms of a damaged throttle body include the following 4 points: 1. Unstable engine idle speed, with high idle speed persisting without dropping; 2. Difficulty in starting the engine, especially during cold starts; 3. Insufficient power, poor acceleration performance, and unstable operation; 4. Black smoke from the car's exhaust pipe and increased fuel consumption. There are 3 methods for cleaning the throttle body: 1. Turn off the ignition switch and remove the negative terminal of the battery; 2. Remove the throttle cable, intake hose, and screws fixing the throttle body in sequence; 3. Clean the throttle body with a cleaning agent, and use a cotton thread to wipe areas that cannot be reached by the cleaning agent.