View Single Post
patkeefe patkeefe is offline
one of the great unwashed
patkeefe's Avatar
Join Date: Apr 2004
Location: Ringwood, NJ
Posts: 2,850
The AAR (auxiliary air regulator) is the electrically powered valve which is open when cold, and allows extra air to bypass the throttle. When it gets warm, the sliding disc in it closes the opening, and shuts off the bypass air. In my car, it keeps it from stalling when cold, so it is worthwile to have.

The AAV (auxiliary air valve) is a disc shaped thingy, which is plumbed in parallel to the AAR. From what I've researched on it, it closes at approximately 5" vacuum. It was put in theoretically to assist on warm start when the AAR is closed. Someone has suggested "right foot" as a viable alternative...I'll go with that!

As my car started life as an n/a 3.0L, I am blowing through devices that were meant to get sucked through. I have had intermittent long decel problems in the past, as though the decel valve were still there. Maybe this will fix that.

Patrick E. Keefe
78 SC
01 Boxster
Old 11-24-2007, 03:39 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)