Quote:
Originally Posted by fornowh
@jsceash- Love the link you have on the post below with the picture, my question is where does the other empty tube goes from the tank-four way line.
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Manual transmissions have a 3-way, the 4-way is for tiptronic. The extra line goes to a valve on the transmission. If you look at the diagram for the Air Injection system in the Katalog, it lists part "21" Y piece, and part "(21)" Distributing piece fourfold with option 249 (tiptronic transmission).