Posted for <dskeele@bellsouth.net>:

Lee,
    A two cents worth.. It appears thatit could be a fuel/metering problem.  We don't know what happened between the 6 sec sampling points, but since all four cylinders dropped in EGT at the same time (first of the six points) and then the yellow trace moved up to lead the rest, then the others followed later at irregular times gives thought to fuel/metering rather than electrical due also to the length of the anomoly..Don Skeele LNC-2