What is the performance of throttle damage?

The performance of throttle damage: 1, the engine idle speed is unstable, the high idle speed continues to drop, and the engine is difficult to start, especially the cold start; 2. The engine has insufficient power, poor acceleration performance and unstable operation; 3, the exhaust pipe of the car emits black smoke, which increases fuel consumption. If it is determined that the fault of the throttle valve is permanent, it must be replaced. Generally, the throttle cannot be disassembled for maintenance, only the assembly can be replaced. Correct and standardized throttle cleaning can ensure the normal operation of the engine, but excessive cleaning will cause the special coating of the throttle cavity to be washed away gradually, and the inner cavity will lose its coating, which is more likely to cause greasy adhesion, thus becoming a vicious circle, and the final result is scrapping.