Is it normal for Angkor Sela to hear the sneer of the throttle switch when she can't power on the car and step on the throttle?

It is not normal and normal to hear the sneer of the throttle switch without stepping on the throttle. Because of cleaning the throttle, the pipeline may leak, which is not normal. Did the engine power drop? You can check yourself first to see if there is any noise during idling and acceleration, and if the intake pipe is installed in place. If there is a problem, fix it as soon as possible.