What are the symptoms of a faulty car throttle body?

[DelGarrett]

The symptoms of a faulty car throttle body include: 1. Unstable engine idle speed, with high idle speed persisting and not decreasing; 2. Difficulty in starting the engine; 3. Insufficient engine power, poor acceleration performance, and unstable operation; 4. Black smoke coming from the car's exhaust pipe; 5. The engine warning light is on. The car throttle body is a controllable valve that regulates the air entering the engine. After the air enters the intake pipe, it mixes with gasoline to form a combustible mixture, which then burns to produce power. The method for cleaning the throttle body is: 1. Turn off the ignition switch and disconnect the negative terminal of the battery; 2. Remove the throttle cable, intake hose, and screws securing the throttle body in sequence; 3. Clean the throttle body with a cleaning agent, and use a cotton swab to wipe areas that are hard to reach.