Dave,
      Swap out the idle control unit.  This is the small box behind the
right rear tail light.  These must have a deault that allows the idle
to raise when they go bad.

                                                    Eric

David Marshall wrote:

>I'm trying to get his 2.1L motor of mine to idle correctly before I remove
>it from my Single Cab and install it into my Westfalia.  There is no
>tachometer in the Single Cab, but I estimate idle was around 2500 rpm before
>I started messing with it.
>
>I corrected the closed throttle switch not engaging, set the timing to stock
>values, checked the TEMP II sender (OK).  The throttle valve butterfly
>itself seems a little worn, I can move it up and down a little and when it
>is up, the idle drops down to near normal values.  Pushing it down (1mm)
>will bring it up to a 1.5 to 2K roar.  I have swapped the idle stabilizer
>valve out with a known to work unit, the idle bypass valve is working and
>pinching the line makes no difference.
>
>To me, it seems like too much air is getting past the throttle valve and I
>may need a new one.  Will a 1.9L throttle valve work?  Anything else I
>should try?
>
>David Marshall
>
>Fast Forward Automotive Inc.
>4356 Quesnel-Hixon Road
>Quesnel BC Canada  V2J 6Z3
>
>http://www.fastforward.ca    mailto:sales@fastforward.ca
>Phone: (250) 992 7775        FAX: (250) 992 1160
>
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