[ia95ram]

I've noticed when I have the fan on (doesn't matter if AC is on or not) and go up a hill, the fan doesn't blow as much. The same thing happens in my dad's (both '95 360's). Anyone else experience this?

 

[RodgeDam]

It is a vacuum leak. I believe there is a TSB that has the details. It is typically caused by battery acid dripping on the vacuum lines to the cruise control that is located below it.