Danno, may have lead me down the right path for the problem source as
being the poor signal at the AFM.

My search found the following:

Volkswagen technical bulletin group 24 # 92-02 April 30th 1992 explains
of the bucking/surging fix is an updated box that has a diode or
something to clean the signal.
Part # 025 906 302A $150.00.
Installation is as easy as removing the connector to the AFM and
installing in between it and the connector.

A clue I was looking for from my wife was any change in the tachometer
when the bucking happened.
She noticed no change in the tach, no flutter or drop during the surging

I than ruled out ignition related problems like the hall sender and
grounds related to ignition.
It looks now to be as simple as a fuel filter (doubtful, just replaced
before this trip) or the big $150.00 part.

Thanks to all who responded.

Unless I could of missed other options I have the part lined up in
Indianapolis.

Thanks again
Rob