How to repair the stuck accelerator of Buick LaCrosse?

In the initial stage, the dirty throttle is characterized by unstable idle speed at the start, or the engine speed drops to 500 rpm when the red light brakes, and occasionally it will stall. In severe cases, there will be no car, and the engine fault indicator light will be on. Cleaning the throttle valve is relatively simple. Remove the intake pipe, four throttle fixing bolts and two cooling water pipes, then unplug the throttle position sensor and remove the throttle body for cleaning. After washing the accelerator, use a special diagnostic instrument for idle learning.