inflatedKarma

Part 2. Vacuum system: The typical diagram (attached) does not really match my car (2001 Boxster). You will find two “Y” connectors instead of one. The lower connects directly to the vacuum tank with one arm of the “Y” going to the second “Y” and the other to the Electronic Change Over Valve. If you have oil on the vacuum lines, then you should replace the rubber protective tubes (what the stiff vacuum tube pushes into.) These expand when in contact with the oil and may no longer hold a vacuum. Boxster_...n_System.jpg Upper_Y.jpgLower_Y.jpg Rant: Went to Steven’s Creek Porsche (Santa Clara, CA ) to buy some of the small diameter, stiff, vacuum line since I broke one of the sections. The person running the parts desk said he had never seen vacuum lines like I was describing (the lines are shown in the Porsche Catalog, but without a part number) and wanted to sell me the larger, more flexible line. A second person working parts backed him up saying they had never seen a vacuum line like that before. Next I called Fletcher Porsche in Fremont, who said they had a meter of it in stock. I’m finished with Steven’s Creek. Last week a bought a lower hose clamp from them for my AOS replacement, and they changed ~$8 for the same clamp that Sunset Porsche charges ~$2 for. Rant Over.

this is an old post but I am hoping someone is still watching it. 

I have a 2001 Boxster S with a similar hose setup (i.e. two Y connections instead of one). however on mine the lower Y only to the second Y and the vacuum tank. the third only has a short piece of hose that goes nowhere. the second y connects to the resonance tube boot and to the Change over valve. 

looking this post it seems the change over valve should be connected to the first Y, but what is connected to the second Y?

Thanks