What is the serious jitter of the air conditioner in Liana a6 hatchback?

Hello, according to your description, the engine idle speed control is poor. It should be that there is too much carbon deposit in the throttle valve, which leads to the inability of the engine computer to accurately control the air intake, resulting in poor idle speed control. You just need to clean the throttle. I'm happy to answer your question. I hope I can help you. Have a nice trip! If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.