idle surge or.....what?

I was driving down the highway and my boost hit about 10 psi and then it sound like a high shrek like a hose fell off. When i parked the vacum gauge read like 15 so i let my car sit and cool off, since i dont have a turbo timer. Then the next day i started up my car and at a stop light the idle drops to almost 0 then it goes up a little and back down.... Does anyone no what the problem is??????

Did you actually check anything out yet? You said it sounded like a hose came off. Did a hose come off?

no i looked around and didnt see anything....when im around 6k rpm i hear the same sound