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-   -   1981 Vacuum line question (http://forums.pelicanparts.com/porsche-928-technical-forum/1179364-1981-vacuum-line-question.html)

Crest928 06-24-2025 12:44 PM

1981 Vacuum line question
 
http://forums.pelicanparts.com/uploa...1750797493.jpg

This photo is from my 1981 5-speed, USA model.

I have a question about my vacuum lines. Please see attached photo. (I put white paper behind the lines for better visual)
I noticed there is an open vacuum line coming off my quad connector.
Should this line be blocked off or should this be connected somewhere else?

stepson 07-10-2025 12:55 PM

I believe it should be blocked. From the blue valve, you should have: 1) a vacuum line through the firewall to the vacuum manifold for the climate control actuators 2) for an AT 928, a vacuum line to the transmission modulator. For a manual, no vacuum line. 3) a vacuum line connecting each of the fuel dampeners and fuel pressure regulator(FPR) to each other, and 4) a vacuum line leading to the cruise control located in the driver side fender.

There may be a vacuum diagram for your specific year 928 located on the underside of your hood.

beneja 07-19-2025 09:17 PM

I believe so

MD540iT 07-20-2025 11:11 PM

Quote:

Originally Posted by beneja (Post 12500693)
I believe so

this "new user" is a scammer, FYI guys, its beginning to be easy to spot them:mad:


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