can anyone tell me what this is?

[rnbguy]

hey does anyone know what this spare vacuum hole is for? :

http://users.tpg.com.au/rnbguy1//IMAGE_00022.jpg
http://users.tpg.com.au/rnbguy1//IMAGE_00022.jpg

[SLOWEGG]

Have u checked inside if theres a flat head screw type? Looks like where you adjust your idle.

[rnbguy]

yeah theres a flat head, it didnt affect my idle when adjusting it, ill try some more later..

[|N|]

thats for u to adjust idle...
clockwise idle go lower... if i didnt remmeber it wrong....

[SLOWEGG]

yeah theres a flat head, it didnt affect my idle when adjusting it, ill try some more later..

If it idles fine then just leave it the way it is :)

[bennjamin]

yes its adjusted from factory - and sealed. There is no reason you should adjust it , unless you have a different type or charcoal canister setup (IE in a conversion etc)

[rnbguy]

hey fellas just curious with obd2 cars, adjusting the idle is it done simply through this screw? because i adjust it and idle isnt changing