The 1.9 does not have a mechanical idle control valve like the 2.1.  There is an electrical control module and also the auxiliary air valve which allows extra air on cold days...resulting in the control module adding more fuel.
The first thing I would do is check the aux air valve.  If it is not opening when cold, you will not have fast idle on a cold engine.
Z 

     On Monday, December 15, 2014 11:59 AM, Dan N <dn92610@GMAIL.COM> wrote:
   

 usually clean the Idle Control Valve will fix it...

On Mon, Dec 15, 2014 at 10:56 AM, John Lauterbach <john@jhl.mgacoxmail.com>
wrote:
>
> Generally fast idle when cold is not a problem as most nights my '84
> Vanagon sleeps in a heated garage.  It spent this past weekend out in
> the cold in the boondocks of middle Georgia.  Temperature this morning
> was around 30 F.  Van started right away, but no fast idle.  Engine held
> normal idle and sounded rough for first couple of minutes.  Engine oil
> is Mobil 1 15W-50.  What should I look at to get fast idle back?
>
> John
>