How is the throttle valve returning slowly when cleaning Futian Yuling 465 engine?

It is normal for Futian Yuling 465 engine to clean the throttle slowly. This is normal. After cleaning, the idle speed is slightly higher than before, and the throttle sensitivity is improved. The data of the engine control unit still stays before cleaning, and the throttle will slowly return.

Futian is a cross-regional, cross-industry and cross-ownership state-owned listed company, headquartered in Changping District, Beijing, with existing assets of nearly 86 1 100 million yuan, brand value of1328.67 million yuan and nearly 40,000 employees. It is a management center in Beijing.