In the process of changing my upper engine mount and pounding with a large hammer to get the mount installed I must have inadvertently disconnected a small hose. It comes from the back of the air intake box (that contains the air cleaner). It is the top most hose and attaches to the box with an l shaped rubber coupling. It is black and I would say it is about 1/8 inch in diameter and maybe 18 - 24 inches in length. I can't find where this hose connects to and I'm having trouble finding any info about it in my Chilton's guide. Anyone know anything about this?

 

If setup on your car is same like on my 850 N/A , tube goes on the nipple under the air box where cold and hot air enter the box. Actually it goes on valve that control gate for hot and cold air.
Here is picture:

 

It looks a bit different on the S/70 but basically the hose goes were you indicated. Thanks.

 

your welcome