At 04:41 PM 8/13/2011, Zach Hale wrote:
>... after descending a large grade ... It wasn't exactly jerky as
>much as it was like power was fading in an out. ... I was letting
>the back-pressure on my engine help slow me down going downhill as I always do.

The same thing happens to me in my stick-shift '84 Westy with a
GoWesty 2.3L engine.

I don't worry about it much.  I figure maybe the plugs get a little
fouled as the engine pumps with no ignition.  It clears pretty quickly.

But like you, I'll be curious to hear what others have to say!