What are the symptoms when the throttle is broken?

If the throttle is broken, the engine will be unstable at idle speed, the car will be difficult to start, the car will not come down at high idle speed, the car power will become insufficient, the acceleration performance will become worse, and the exhaust pipe will emit black smoke. The throttle position sensor of automobile can also be called the throttle opening sensor, which can judge whether the engine is in idle working state or compound working state through detection. The throttle position sensor is a constant variable resistor installed on the throttle. When the throttle is in the idle position, the idle contact is closed. The computer can identify the load of the engine by the signal from the throttle position sensor, and correct the fuel injection quantity of the engine by these working state signals. Million car purchase subsidy