Topic: 67-up Ported Vacuum Switch (PVS) Purpose and Diagnostic Procedure

[J_Speegle]

Posted this elsewhere and thought it may benefit members here at some point.

In Ford training and in state/national emission training manuals didn't find anything that specified an exact temperature range. Can offer the following description as to how it works (in some applications the lower port is just a filter)




And Ford's testing process for service personal from the period



Hope this helps