What is the high idle speed of the van hot car?

The most likely reason is that the throttle is stuck or out of its adjustment range because of the carbon deposit blocking the idle channel, or the throttle shaft is stuck because of too much carbon deposit, which will lead to the increase of idle speed after receiving oil. After cleaning the throttle, the idle speed of oil collection will increase, which has happened many times. This is because when cleaning the carbon deposit, the carbon deposit solution enters the throttle shaft, causing the throttle shaft and the valve body base to get stuck. It may be the engine computer again, but it needs a special diagnostic computer to determine. I hope my answer is helpful to you.

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