What causes the Wuling Zhiguang to stall when releasing the throttle with the AC on?

[LaAngela]

The reason why the Wuling Zhiguang stalls when releasing the throttle with the AC on is due to a dirty idle control valve, which causes excessive operational resistance, or the idle speed being too low. Below is relevant information about the idle control valve: 1. Overview: The idle control valve is primarily responsible for maintaining the car's idle speed, aiming to adjust the idle based on the engine load during idling. 2. Working principle: The idle control valve is mounted on the throttle body and is used by the engine control unit to regulate engine idle speed. When the engine speed deviates from idle, the throttle valve adjusts, controlling the amount of air entering the intake manifold, which is mechanically operated by the accelerator pedal cable. The throttle body features a bypass air passage that supplies air during engine idling (when the throttle valve is closed). The idle control valve's pivot extends into the bypass air passage, regulating the airflow. The engine control unit, based on input signals from various sensors, adjusts the engine idle speed by moving the idle control valve's pivot in and out of the bypass air passage.