The idle speed of Buick Regal is unstable after cleaning the throttle, and the idle speed will rise when the throttle is released during driving. Ask the great god for an answer

There are several possibilities! First, the idle valve is too dirty and the cleaning is not thorough; Second, there may be too much cleaning agent left in the cleaning process, which is not completely burned; Third, it is caused by poor sealing of throttle body; Fourth, there is no re-execution of computer data matching! It is recommended to go to the repair shop for inspection and handling!