Why does fuel consumption increase after cleaning the throttle?

There are two reasons for high fuel consumption after valve cleaning: 1, the valve does not match the engine control unit after cleaning or the matching is unsuccessful; When cleaning the throttle, the engine control unit is not familiar with the position of the throttle, and there will be confusion when controlling the throttle opening, which will lead to an increase in fuel consumption. 2. Some models are caused by poor self-learning ability of engine control unit: due to uncontrollable factors of poor self-learning ability of engine control unit of some models, fuel consumption will increase in a short time, but it will recover after driving for a period of time.