ive got a vacum line that comes from back of intake goes over toward the brake booster and T's one goes into the cab and the other is about 1 foot long and plugged off? my hood was replaced with aftermarket before i got it. was there something on the hood like a ball? my selector switch for my vents, floor, defrost, etc usally hiss at me and never go where its supossed to? so i was wondering if that vacum line had something to do with it. i have a 95 blazer 4x4 4.3 vortec vin w

 

that ball was a vacuum cansited put it back on where the plug is