How is the throttle body broken?

The reason for the fracture of the throttle body may be mechanical failure, dirt or imbalance. The damaged throttle will cause the vehicle to fail to start, the exhaust pipe emits black smoke, the idle speed is high, and the acceleration is not smooth, so it needs to be replaced in time. The performance of the throttle fault is as follows: 1. Engine idle speed is unstable, idle speed drops, and it is difficult to start the engine, which is the difficulty of cold start; 2. The engine is unstable or not idling; 3. The engine is difficult to start; 4. The engine has insufficient power, poor acceleration performance and unstable operation.