What are the symptoms of a damaged throttle body?

[McEloise]

Symptoms of a damaged throttle body include: 1. Unstable engine idle speed, with high idle speed persisting and not decreasing; 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. The method for cleaning the throttle body is: 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 are hard to reach. The throttle body is a controllable valve that regulates the air entering the engine. After entering the intake pipe, the air mixes with gasoline to form a combustible mixture, which then burns to generate power.