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As far as the brake rub goes, I would check the wheel bearings. Probably shot. You should be getting noises if this is the case. Or, long shot, adjustment on the wheel bearing is not correct (loose).
The vacuum line might be for the the heater. There is a valve under the heater cover that it goes to (looks sorta like a spider). Could also be for the wipers, although this one is not a tiny hose. If it is for the heater, look for a manual heater control under the plenum in the engine compartment, as the valve controls the temperature and if the valve didn't work, the previous owner may have installed the manual control.
Let us know what the rubbing was caused by when you find out.
Last edited by paul2748; 10-03-2012 at 09:57 PM.
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