Is it normal for the throttle to idle at high speed after cleaning?

Different types of throttle valves have different cleaning operations. For example, the throttle cleaning of Volkswagen models basically does not need to be matched, so it can be used directly. However, most vehicles need to do throttle matching after cleaning the throttle. This is because the throttle opening will increase after the throttle becomes dirty. The engine computer and throttle have adapted to this angle. After you clean the throttle, the throttle opening does not change, but the carbon deposit is gone after the throttle is cleaned, so the opening becomes larger and the air intake becomes more, so the engine idle speed will rise, jitter, instability and so on. All you have to do is re-match the throttle with the maintenance computer.