Replacing a few vacuum hoses that were getting old, using the workshop manual vacuum hose diagram to put it back together. The only thing is... its telling me that the highlighted hose goes to the bottom nipple there on the throttle body. This has me a little confused since just by looking it would seem to make more sense on the middle nipple. Is that right?

 

If the 2nd picture is the hose that splits into 4 small ones, it's for the oil injectors. It goes to all 4 of them and attaches on the other end to the front of the TB.

 

Yes, the main hose does split into four hoses that all run to the oil injectors. But the way the whole thing is set up it looks like logically its supposed to go to one of those nipples on the back of the throttle body.
Not to mention I cant find anywhere it could possibly even go on the front of the throttle body. Heres a picture of it, am I missing something here?? Help me out.

 

Yes, it goes to the back of the UIM.

 

Which nipple (from the first picture) does it go to, thats what Im trying to find out.

 

There are three nipples on the front of the UIM and either 3 or 4 on the back depending on what year TII you have. If you have removed the vacuum spider (emissions removal) you will cap all of them off except the one that goes to the oil injectors (back of UIM in the group of 3 or 4), the line that goes to the brake booster (to the passenger side of the group of 3 or 4), and the one on the UIM above the turbo that goes to the boost sensor.

 

I believe stock it goes to the middle one in the first picture (the one not connected or circled). But I'm 99% sure it doesn't really matter which one it connects too as long as it is a good connection (i.e. the hose fits tightly).

 

thanks.