Front AC dies when vacuum low
I have a 2003 Navigator that has an annoying AC poblem.
Whenever I accellerate (even slightly) all the air stops blowing through the front air ducts. When I am coasting o cruising at light load, the air blows just fine. Since these conditions correspond to low vacuum conditions, I assume that there is a problem with the vacuum accumulato or something similar. The poblem is that I cannot find any of the related vacuum components. I have the helm factory manual on disk. It shows pictues of all the componenets, but I cannot find anything that shows me where these components are located. I have other ford factory manuals and they have really good sections that diagram the location of components. Why doesn't this one?