Is it normal for Mondeo to win 2.3 idle speed of 4000- 1500?

Idling at 4000- 1500 is not normal when the car is cold, but normal when it is hot.

It is not normal for the car to idle at 4000 ~ 1500 rpm when it is cold, and the car will shake at this time. The most common causes of automobile jitter are that the throttle is too dirty or the fuel injector has too much carbon deposit, the spark plug gap is too large and the gasoline is not good.

In the hot car state, the idle speed of 4000 ~ 1500 rpm is normal. With the increase of engine water temperature, the engine speed will decrease accordingly.