cruise control vacuum

does anybody know what would cause the vacuum to stop working on the cruise control system?

There is a bladder inside the can that controls the cruise control. When it goes bad or gets a small pin hole the vacuum will no longer hold and the cruise will not work properly or at all. Go to a wrecking yard and get another one since there is no way to fix the one you have.

I had a small tear in my boot and just fixed it with a bike tire repair kit. It has worked perfect now for over 2 years.