Is the throttle valve coated?

Yes The inner wall of the throttle valve has a special coating treatment, which is as smooth and shiny as mercury coating, and has the functions of anti-static, non-dust absorption and reducing the formation of sludge on its surface. Throttle is a controllable valve that controls air to enter the engine. After the air enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, and the combustion is successful.