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Registered
Join Date: Nov 2024
Posts: 1
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1981 Vacuum line question
 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? |
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06-24-2025, 12:44 PM
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Registered
Join Date: Mar 2010
Location: Texas
Posts: 2,135
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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.
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John Curry (Drift King) 928OC member Grand Prix White 1994 GTS AT (The GTS) Black 1989 GT (The GT) and Cobalt Blue 1989 S4 AT (The Blue Car) 1986 Euro AT Indishrot 1984 Euro S AT (The Stepson) and Black Metallic 1984 Euro S 5 speed (The Schwartz) |
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07-10-2025, 12:55 PM
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Banned
Join Date: Jul 2025
Posts: 4
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I believe so
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07-19-2025, 09:17 PM
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I'm working on it....
Join Date: Mar 2003
Location: Denver
Posts: 229
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07-20-2025, 11:11 PM
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