There is a little known problem of static electricity building up on the AFM.
One day while traveling in the southwest my van began to do this very same
thing and I was lucky enough to come upon a competent dealer that knew of what
he called VW's undeclared recall item that consisted of a fancy ground cable.
This unit served to shunt unwanted electrical build-up from the AFM.  The
dealer said the problem occured more on fall/winter days when it was cold
out.  Probably something you could ground yourself, it cost about $120 at the
time.

Mike Garske

Matt Heydon wrote:

> To the group:
> I have an '87 Westy that as I tool down the road it feels like someone is
> tapping on the brakes.  I don't know how to tell if the condition is spark
> or fuel delivery related.  I have replaced the fuel filter and cap / rotor.
> Any ideas would be very helpful and appreciated.
> Matt