I have a similar problem in cold weather, but mine is much colder in
northern NH. There is a known Vanagon problem with the AFM, but I
haven't heard anyone relate it to cold weater.
   But I believe in my case a frost film is developing on the resistance
material, and insulating it from the wiper. (This is what I found in a
test in my freezer.)
     When this happens parking with it idling always cures it.
Stan
87 Syncro

K G Gilbert wrote:

> Dear Volkans,
>
> 1. My '84 Westy and I reside in the Mid-Atlantic. Once cold weather starts
> (<40 F is cold), the van experiences an occasional, intermittent "miss", while
> driving at highway speed. It usually goes away, but sometimes we lurch off and
> on for an hour. Tuneups and fuel and air filter replacements have been
> performed. Is the Air Flow Meter a possible cause? Remember, this only occurs in cold
> weather, while the van is at warm temperature. Exactly what does the AFM do?
> If I need one, is a junkyard part ok? How much should I pay?
>
> 2. Again, in cold weather, the AT is slow to engage until the van is warm. Is
> this indicative of another way I can part with money in the future? A non-VW
> mechanic has told me NOT to change the fluid in the transmission. Hmmm?
>
> 3. I'll be making a NE trip in October. What spare parts/supplies do you all
> regularly carry?
> I usually carry oil, 50/50 coolant, belts, AT fluid, brake fluid, duct tape,
> etc. I'd just like to know what essentials are inside your closets.
>
> 4. Is there an event on Cape Cod early October?
>
> TIA,
> KGG
>
>