Kuga 1.5 Throttle Oil Accumulation

When the maverick started cold, the idle speed was unstable, and the tachometer went up and down, like stepping on the throttle and putting it down, but it disappeared after the hot start. What's wrong with cold idle? Fix it. If the idle speed of the engine is unstable, it is easy to turn off the engine when it is cold, and it is basically normal after it is hot. The reasons are usually as follows: 1) When it is cold, the additional air valve is not opened or the opening is too small, which makes the engine idle too low, resulting in unstable idle speed. 2) When the engine is cold, the idle speed control valve fails and the opening is too small, which makes the idle speed too low when the engine is cold, resulting in unstable idle speed. 3) The fault of the water temperature sensor makes the engine computer unable to increase the idle speed and add rich mixture according to the engine temperature when the car is cold, resulting in unstable idle speed. 4) The fuel injector is poorly atomized or partially blocked, which makes the mixture quality worse or the fuel injection amount is too small when the vehicle is idling, resulting in the mixture being too thin and the idling is unstable. @20 19