High idle, problem with idle air motor

Eric Sanborn eric.s.lists at gmail.com
Fri Mar 7 17:31:10 PST 2008

On Fri, Mar 7, 2008 at 8:09 PM,  <tlum at flash.net> wrote:
> Hi Eric,
>  There's a separate double wide relay that controls the ISV.  It normally resides in the relay panel in front of the driver's knee.  Don't know where it is in your car.
>  He should also check to see that the idle/wot switch is working correctly.
>  HTH,
>  Tony
>  '83 urquattro #302
>  '87 5kcstq

I was thinking more about this.  I do recall using the double relay
base control unit, but I just looked at the 4k Bentley and it looks
like the ECU controlled this on the 4k.  Other 4k owners out there am
I remembering correct?  If so I must have used the 5kt unit when I
built it.  It has been a while so it is hard to remember back that
far.  I don't think the new owner has extra 5k parts to swap out.  I
guess I need to find my 5k manual and check for troubleshooting steps.


Eric Sanborn

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