where does this wire go to?
 

http://i8.photobucket.com/albums/a11...l/DSC02562.jpg

the black sensor with the white sticker on it on the bottom right of the pic has a wire that runs below it, where does it go?

that looks like the air pump relay

It's a connector for the air pump wiring....goes to the relay under the ECU one one end..and the air pump on the other

Think you are referring to the barometric sensor? It's not a wire that gos down just a open ended vacuum tube, it senses barometric pressure.

'9k is right - barometric sensor, tells the computer what the air pressure is.

Pic removed due to hugeosity.