10 Yun Qi 2, driving 80,000 kilometers, driving 100 kilometers, what happened after the idle speed fluctuated?

The reasons for the high and low idle speed of the car may be: 1, excessive carbon deposition in the throttle valve, air leakage in the intake manifold or various valves. This fault directly affects the quality and combustion effect of fuel mixture. Parts that may leak air, such as intake manifold, vacuum tube, activated carbon canister valve, exhaust gas recirculation (EGR) valve and positive crankcase ventilation (PCV) valve, need to be inspected one by one.