Chasing a vacuum leak today due to a low idle (and recurring vacuum wheezing sounds) and came across this on the passenger side near the coolant reservoir. Seems to be missing a hose.

Anyone know what it is and what is connects to?

Sprayed brake cleaner in the general area and the idle rose briefly.

 

Air pump valve?

930 113 147 01??

 

Is there another hose which should be connected to it?

 

One rubber hose going in to it from the air pump, one on the opposite side going to your intake, one metal one going to the exhaust (might be a rubber bit between valve and metal hose, and then the vacuum line on the top.

 

OK so that little nipple protruding under that vacuum hose is not a fitting?

So I should suspect the vacuum leak is under the air box in that maze of vacuum hose?