What will happen if the throttle is not clean?

The dirty throttle of the automobile will cause air with impurities to enter the combustion chamber of the engine, which is mainly manifested as: 1, and the vehicle cannot be started or it is difficult to start. 2. Unstable idle speed, driving (too high or too low idle speed), etc. 3. Fuel consumption may increase. 4. Affect other parameter values: for example, the throttle opening and stepping motor steps collected by ECU will be affected, resulting in errors, such as ignition advance, injection timing and injection quantity. In this way, the engine has many shortcomings, such as poor working conditions, rising fuel consumption and engine jitter. 5, the acceleration is weak and the speed can't afford it. 6, emissions are not up to standard. 7, car, hair and other anomalies. 8. Obstruction during refueling: For example, the throttle body is stuck and the idle valve cannot turn.