Why does Fox 1.8 always shut down! ! !

There is carbon deposit in the throttle. Take it down, clean it up, and reset KAM with your ID card. The control principle of electronic throttle is that the accelerator pedal gives PCM an opening signal, and PCM calculates a relative voltage to control the stepping motor of throttle, so that the throttle opening reaches a certain level. At the same time, there is a position sensor on the throttle to judge whether the throttle reaches the relative position. If there is something stuck in the throttle, the actual throttle opening will be inconsistent with the target opening. PCM will control the stepping motor of the throttle again to make it open a little bit. If it is bigger, PCM will find that the speed exceeds the target setting, and will turn down the throttle, which will happen repeatedly, especially at low speed or idle speed. The solution to this phenomenon is to clean the throttle valve, which will break down after repeated cleaning. Another method is prevention. When driving, try to shift gears with a large throttle. When the throttle is large, the air intake will be larger, and the carbon deposit can be sucked into the engine for combustion to avoid excessive carbon deposit.