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Date:         Tue, 21 Aug 2007 18:26:58 -0400
Reply-To:     Mike S <mikes@FLATSURFACE.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mike S <mikes@FLATSURFACE.COM>
Subject:      Re: Rough running till warmed up
Comments: To: Evan Mac Donald <macdonald1987@SBCGLOBAL.NET>
In-Reply-To:  <387174.72585.qm@web81703.mail.mud.yahoo.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 06:02 PM 8/21/2007, Evan Mac Donald wrote...
>The butterfly plate in the throttle could be worn, and the shaft and
>plate do not settle into place properly. This will have two major
>effects. One, the throttle plate will not seal off the throat of the
>throttle body properly, so you in effect have a HUGE vaccuum leak.


Just a clarification. That would not be considered a vacuum leak,
because anything leaking past the throttle plate is still measured by
the air sensor, so the mixture remains correct. A true vacuum leak
results in a lean mixture, because it's not being measured.


It would result in a varying and difficult to set idle, though.
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