Firebirdracer203

I currently bought a red haltech stinger intake for my 1998 corvette for pfyc.com, but it didnt come with instructions and i got the maf and everything hooked up but i noticed a tiny little vacum line that doesnt hook up anywhere and I was just wondering if anyone knows where it goes. My check engine light is on but the car drive fine i scaned it with that orange computer thing and it said its a "vaf" but i donno what a "vaf" is.