When the throttle is not cleaned after washing the car, the idle speed rises and the throttle is stuck.

After the vehicle cleans the intake valve, the flap still moves in the original formation, which is equivalent to not being in place. If you don't do it, the engine computer will take a long time to adjust and recover. This will lead to high idle speed. That is to say, the position of carbon deposition is regarded as the ontology, that is to say, the throttle valve is not at all but near the position of carbon deposition. Computer programming is needed in this case, but the difference is that the carbon deposit is washed away. So the air intake will be a little more than usual, because there will be impurities in the long-term air intake process, which will accumulate at the throttle for a long time, and then more and more carbon will be deposited. When the throttle valve reciprocates, it will be resisted for a long time, so the engine computer will adjust the position of the throttle valve.