What is the purpose of cleaning the throttle inlet nozzle? What are the advantages and disadvantages?

The purpose of cleaning is to remove carbon deposits.

Cleaning the throttle can restore the accuracy of each sensor, avoid the throttle sticking, and solve the problems such as unstable idle speed.

Cleaning the nozzle can maintain the normal operation of the nozzle, average the fuel injection quantity of each nozzle, and avoid the situation that the gasoline is sprayed less and less. For example, a four-bar car has four nozzles, and one of them has poor fuel injection, that is, the fuel injection quantity is reduced, so the computer will adjust the other three nozzles to inject more fuel, which will increase fuel consumption and reduce power. Of course, this is only one of the situations.