How your fuel tank/filter doing?
This sound like fuel starvation. I have seen that on partially clogued tank.

Could also be a FI related problem, but you have to eliminate the fuel
starvation possibility.

Ben
http://www.benplace.com/vw2.htm

-------------------------------------------------------------------
I'm having an intermittent problem with my 89 Westy. I've only noticed the
problem when I'm driving on the highway. It gradually looses power so it
will only go 55 mph on a flat, windless highway. Then, later, it will go 80
on a flat, windless highway.

Suggestions?

Ray 89 MT Westy