Need help, 2000 New Beetle acceleration squeal
 

I have a 2000 New Beetle 1.8L turbo and when I accelerate quickly there is a loud squeal. There is a release of pressure as well that can be felt on the drivers side gas pedal when the sound occurs (so I'm assuming it's a problem with a vacuum hose that has come loose or cracked. Has anyone had this problem or can anyone tell me what might be causing this noise? It has been mis-diagnosed twice by mechanics so I'm just looking for other possibilities. Thanks.

im not sure if this is it im not a machanic
 

i had a sqeal in my 04 beatle when i would be flooring it when the car would shift ,this was my ol ladys car an auto matic.it was the belt sqealing so i adjusted it.im not saying thats it im just telling you i had a simular problem:)