Why is the oil changed by Wuling Hongguang a little unstable?

Hello, I just changed the oil, and the idle speed is a little shaky, because there will be a lot of carbon deposits in the fuel system. Suggested solution: 1. Cleaning the fuel system in a regular enterprise does not need to be disassembled. The gasoline supply section (nozzle, combustion chamber and three-way catalytic converter) and the air section (throttle valve, intake pipe and combustion chamber) are systematically cleaned and maintained to clean all kinds of carbon deposits in the whole system. In addition to effectively eliminating the above faults, it can also reduce the risk of knocking and provide effective data for electronic sensors. 2. Use ordinary qualified gasoline; 3, replace the gasoline filter, check the spark plug, high voltage line and other related components.