This is helpful, thank you. I won't get to call tech today, but it's good to know they are open on Saturdays. I'll run the data logger and see what's going on, and at least I'll have something to share with tech if they ask.
As for the AFR, by default it was in the mid 13's on my unit. I have not really played with adjusting that much yet, and given the above problem, I was hesitant to start moving numbers around. I do agree it seems rich, so maybe I'll try making some adjustments downward and see how it runs. Could that be causing the stumbling problem referenced above?