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This is analagous to the fast idle cam on the VW upright engines' Solex PICT-X carburetors: when the car is cold, the AAR is effectively "pushing the gas pedal" for you just a little bit. On the carb, it literally holds the throttle open; on our D-Jetronic cars, the AAR actually lets a bit of air flow bypass the throttle butterfly, but to the same effect. -Greg ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org