What are the symptoms of automobile throttle failure?

Throttle failure will lead to engine idling instability and non-idling.

The engine idle speed is unstable, the high idle speed drops discontinuously, and it is difficult to start the engine, especially the cold start; Engine idle speed is unstable or no idle speed; It is difficult to start the engine.

The engine has insufficient power, poor acceleration performance and unstable operation; 5. The exhaust pipe of the car emits black smoke, which increases fuel consumption. The change of throttle usage mainly depends on air quality, air filter status, vehicle use environment, driver's driving habits and other factors, so it is impossible to simply judge the cycle of vehicle throttle cleaning by mileage.