what is the vacuum ball- when u say intake leak, or leak at the vacuum ball???

vacume ball is what it sounds like. a ball shaped vacume chamber with a vacume hose goin in and one goin out.

is it right there below the air filter- i think i found it- how do u detect a leak from it or to the intake- or in a hose-

carb cleaner will cause a idle change when sprayed on the leak in the vacum system