Is this the right vacuum line (engine to booster)?
 

My 2000 S has an vacuum leak in a line leaving the left front of the manifold at the point where number 23 is shown in this diagram. The hose goes left and down under the car heading forward. I'm almost positive it's the vacuum feed for the brake booster.

http://i19.photobucket.com/albums/b1...kemanifold.jpg

The online parts places and Porsche catalog show the following diagram. Is number 14 below the right part? My line is leaking at the accordian section at the top where it has rubbed on the chassis. It looks like this line has a junction under the car.

http://i19.photobucket.com/albums/b1...brakelines.jpg

Can anybody confirm if I'm on the right track here? I'm getting ready to order part 14. If anybody has performed this repair and has any insight I'm all ears.

Yes, that is the brake booster line.

Thanks. Looks like $47. Hope it fixes my "running lean, can't enrich any further" codes.

How do I tell if the brake booster vacuum line is leaking? My brake pedal sticks in the downward position and I sometime have to raise it with my foot. I believe is is either the booster or vacuum line. I have a 1999 Boxster. Any help would be appreciated.

that is not a leak you have. when air leaks out of booster line, it will be hard to apply the brake and not the other way around. if i was you, i would definitely have the brake master cylinder and booster checked.