hey civic racer what you do is get any brand carb cleaner and while your engine is running you spray the (usually) black hoses near and/or on the intake manifold with carb cleaner. Be sure to attach the little red tube that comes with the carb cleaner so you dont spray all the hoses at one time.

Now LStegdude, your problem is definetily one of two things. The vaccum hose that goes to the brake booster from your intake manifold or the problem may lie within the brake booster. I would replace the vaccum hose first to see if that fixes it, but if not just replace the booster.