XJ AC problem

jbkelly0211

Well-Known Member
Joined
Jul 20, 2010
Location
Charlotte
Not a huge problem just something I cant figure out and has getten annoying with all the heat we are having. My AC works great, the only issue is that when I am on the interstate it will all of a sudden switch from blowing out the vents to the defrost vents when the AC is on max. In order to make it start blowing through the vents again I have to let off the throttle. Its really annoying when I am in the mountains and have to downshift and the RPMs rise. I know it has to be vaccum related since the problem seems to be related to engine RPM's. Any thoughts?
 
do you still have the vaccum ball connected behind the front bumper?
 
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