There you have got me.  Possibly the contact points aren't in the heavy wear
spot until after a long heat soak causes them to expand.  They are in a spot
that might take a long time for that to happen due to the constant airflow.

Pure guess, though.

tom

On 30 Sep 2003 at 14:59, James V wrote:

> Thanks for the explanations.  The decriptions as a potentiometer makes it
> clearer to me.  What I still don't understand is, why the problem only
> manifests after sustained cruising.  Why doesn't the van always stumble when
> the AFM crosses the "bad contact" point?  I cruise control to work for 20
> minutes and have never had the problem.  Yet, after a few hours of similar
> cruising on the road trip, it happened.  Not that any of this theory
> matters, really - just curious.
>
> James
> 90 Carat
>

------
Tom Ring K0TAR, ex-WA2PHW  EN34hx
85 Westphalia GL Albert
96 Jetta GL The Intimidator
taring@taring.org

"It is better to go into a turn slow, and come out fast, than to go into a turn
fast
and come out dead." Stirling Moss