Unknown Vacuum Hose

does anyone know what this vacuum hose goes to? after i took this picture the vacuum hose broke cuz it was VERY brittle, and we took it to the shop to have the injecters cleaned and stuff, and now i cant find where it goes, can someone get a picture of where this vacuum hose go?
http://files.automotiveforums.com/gallery/watermark.php?file=503/232894picture_of_hose.JPG

What year is your car, what motor? It looks like by the picture it would be for the smog pump but we need more info.

um i gots a 91 camaro rs v6 3.1L

well I don't kow exactly what it is but I'm pretty sure it's emmissions related. If you have the end of it that's pictured, the other end might go into the factory wireloom. I'm guessing it runs across the engine or firewall. Does it run OK and does everyting work normally? Any Check engine light?

Does that thing have heater hoses going to it? If so that is the heater control valve and the vacuum lines goes back to the firewall somewhere.