Hi Mike,

I once had this same thing.  It turned out that the O2 sensor was
getting shorted out.  You could just check it by unplugging the 02
sensor, and see if the rich running symptoms stop.

On the fear and trepediation of AFM adjustment, I agree.  Unfortunately,
we sometimes don't have a choice.  On the brighter side, it's a pretty
hard thing to screw up. Putting a majic marker dot on the current
position for a reference.  The adjustments are pretty fine, a click or
two clockwise will increase the tension and you should observe a leaning
effect.  I used to religiously glue my cap back on, but now find that is
snug enough all be itself.

Mark Keller
91 Carat