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Date:         Sat, 5 Dec 2009 01:01:01 -0500
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Idle stub system
Comments: To: Arkady Mirvis <arkadymirvis@gmail.com>
In-Reply-To:  <521A32C1D54D4D2192038AC1BE056683@Guenther>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 12:03 AM 12/5/2009, Arkady Mirvis wrote: >What is idle stub system? Ark

Sorry Ark -- the full name is idle stabilization system. On the 1.9l engines it's an electrical box plugged into the output from the Hall-effect sensor in the distributor, and it alters the timing to keep idle speed constant.

On the 2.1l it's a much fancier box of electrical tricks located forward of the right tail-light, which constantly adjusts and electrically operated air valve, like an auxiliary throttle, that throttles up the engine to compensate for idling loads. I presume that the second system is more fuel-efficient, as the earlier system functioned quite well. Or it may have been that the addition of power steering and A/C made it simpler to go to a unified system.

Yours, David


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