how to change the idle air control motor on 1992 Dodge D150

the engine idles up and down while in park

Asked by for the 1992 Dodge D150
Best to inspect why this is happening, you may have a vacuum leak, bad oxygen sensor, sticking EGR valve etc, and the idle air motor is 'chasing' meaning it is trying to keep the idle with in spec, but other factors are interfering.