What is the situation of high idle speed after washing the throttle?

During the intake process, impurities will accumulate in the throttle for a long time. Over time, more and more carbon will be deposited. 1. There will be resistance when the throttle moves back and forth. If this happens for a long time, the engine computer will adjust the position of the throttle. In other words, regarding the position of carbon deposit as the vehicle body is equivalent to that the throttle is not in place at all, but close to the position of carbon deposit. 2. After cleaning the intake valve of the vehicle, the valve still moves according to the original shape, which is equivalent to not closing in place, but the carbon deposit has been removed. 3. Therefore, the air intake will exceed the normal value, resulting in high idle speed. In this case, you need to set up your computer. It is recommended to go to the 4S store to set the correlation. If not, it may take a long time to stabilize.