my boost gauge is working at least my lights are but the vac line is not moveing and...

[juggalo]

...my gauge is reading -20? my boost gauge is working at least my lights are but the vac line is not moveing and my gauge is reading -20 and stays there when i start car up i checked the lines and there all tight and i T- ed it off so thats fine would u thank a line my have came off the turbo itself? it was working yester day reading -10 the it acclerated and then i hid the lines wires and its not working everything works but the vac line