Well,   my (87 westy) started right up and quit again just down the road.  Let it sit for a while again and it ran far enough to get the oil changed in town and seems to be idling o.k.  

I am on my way, but don't know for how long.  Changed oil, added 93 gas and some injector cleaner and picked up a gas filter.  I saw Dennis's post that a similar problem may be 02 sensor or wiring.  Maybe I will try disconnecting 02 next time it happens.  May try opening up the AFM box and cleaning it.  Thanks for that tip Richard.
Cheers,
Dave

--- On Mon, 8/8/11, David Vickery <david_vickery@YAHOO.COM> wrote:

> From: David Vickery <david_vickery@YAHOO.COM>
> Subject: Stranded Rock Springs, WY
> To: vanagon@GERRY.VANAGON.COM
> Date: Monday, August 8, 2011, 4:01 PM
> I was lucky to roll up and die across
> from a Starbucks.
> 
> Anyone have thoughts on what this might be?� I just
> came back from 3,000 mile trip.� Had a few times on
> highway what seemed like Vanagon syndrome, cutting out for
> just a second, then continuing on.� No issues when on
> roads that required constant change of throttle
> position.� Funny thing though, I have the AFM pigtail
> on.� So not sure if it could be vanagon syndrome.�
> Perhaps worn AFM.���But why a sudden
> problem.� It would run good if I varied the throttle,
> but if it stumbled on long flat stretches, it wouldn't
> immediately return to normal running.� It would bog a
> bit, or stall if I put the clutch in.� If I coasted for
> a while, it would usually just keep going.� Probably
> happened 10-15 times the whole trip, but always on long even
> grades.
> 
> But when I got off the highway this last time in Rock
> Springs, it just died at the light.� I waited a while,
> drove another few miles to my current spot across from
> starbucks.
> 
> I don't have any spare parts with me to try.� I bet it
> will run again for several miles if I let it cool off.�
> Not sure why that would matter though.� The first time,
> it died, it restarted but died while reving it (fuel
> issue?).� I didn't just fill up, and have been using
> 87, but did just come down from higher elevations to
> whatever Rocks Springs is. It is hot here.
> 
> Anyone have any ideas, or know of a VW shop around here?
>