What should I do with Tengfei 1-2-3?

As for the analysis of the situation you reflected, the reason may be that the idle speed control device is stuck or beyond its adjustment range because of the carbon deposit blocking the idle speed passage, or that the throttle valve is stuck because of too much carbon deposit, which will lead to the increase of idle speed. In many cases, after cleaning the throttle, the idle speed of oil collection will increase. This is because when cleaning the carbon deposit, the carbon deposit solution enters the throttle shaft, causing the blockage between the throttle shaft and the valve body base.

I suggest you go to a 4s shop or a repair shop to check whether the parts analyzed above are faulty.

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