On Wed, 2011-03-16 at 19:45 -0400, David Beierl wrote:

> At 07:13 PM 3/16/2011, Rocket J Squirrel wrote:
> >It will keep doing it until I put the van into gear. Drive up to the
> >bank's drive up window, put it into park, and it will start doing it
> >again. Sit at a traffic light with foot on brake and transmission in
> >Drive (AT) and no hunting at all.
>
> Sounds to me as though your basic idle speed is set too high.   Check
> it out.  If that's the problem it's a very easy fix, and you may find
> that the idle stab module can go back in and all be happy.

That was it. It was idling around 1300. Dialed it down and the surging
went away. Took a fair number of turns on the adjustment screw to get it
down into range. Timing is fine, closed throttle switch closing
properly. I wonder how the idle got drifted so far away from nominal.

Thanks for your help, David.

--
Rocky J Squirrel