Cruise Control and HVAC issues. Vacuum woes.
I've been having what I assume is vacuum issues ever since I bought my Jeep last year.
The cruise control works intermittently. Sometimes it will work fine, other times it will work for a while then shut itself off while going down the road, and other times it won't work at all.
The HVAC controls are a bit screwy too. Most settings work okay, but defrost seems to get stuck halfway. The little vents that shoot air on the side windows start throwing air, but the main center vent for the windshield just whistles and will not throw air.
I have checked my vacuum lines and they all seem to be okay. Checked the check valve in the manifold, also seems okay. I convinced myself that it was the vacuum ball, so I made my own out of PVC and a brass fitting. Now the HVAC controls don't work while going down the road, if you want to change vent settings you have to move the knob then let off the accelerator until idle is reached and then the vents will switch over.