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jwasbury jwasbury is offline
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Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,416
probably not. that is yet another throttle bypass device...only was on the earlier models as far as I know. my '79 had one as vacuum line hooked up. if memory serves, this valve opens to allow air to bypass the throttle body when a vacuum is applied to the nipple. The vacuum line to the nipple would have had a thermo-time valve on it, which would block the vacuum to the AAV after a certain amount of time. you may notice an unused wiring harness plug floating around back there that would have gone to the thermo-time valve.

This was basically another cold-start fast idle gizmo. On my car it was one of 3 such gizmos from the factory:

1) Aux Air regulator
2) Aux Air valve
3) thermo-time valve blocked ignition timing vacuum retard for 60 seconds or so
Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690
Past: 2009 997 Turbo Cab / 1979 930
Old 05-19-2014, 01:22 PM
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