Polo GP's idle speed is suddenly unstable and the steering wheel is shaking. Is it the throttle?

The first problem is not caused by dirty throttle. Generally speaking, when the throttle is dirty, the EPC light on the dashboard will light up and give an alarm, so if the EPC light is not on, it will basically not be a throttle problem. The reason for this problem is that the electronic throttle has not been reset. Polo adopts electronic throttle, which will lead to insufficient spring reset after long use. Sometimes, due to the small throttle given by traffic jam, the spring cannot be reset after a short stroke. Generally speaking, Bigfoot Oil will recover later, which is no problem.

Second, the problem of air-conditioning noise and jitter is that the air-conditioning blower blades are dirty for a long time, and the unbalanced rotation produces * * * vibration, and the vibration point of each car is different. Some cars vibrate in the second gear and some cars vibrate in the third gear. The solution is simple. Just take down the blower and clean it. However, the blower in polo is not easy to disassemble, so if you go to a 4S shop, you are mostly asked to replace it.