[logician]

Grady, Thanks for the reply. I'll check the things that you suggest.

Regarding lean condition, I notice that the left bank is popping (out the stacks) in its current state, even without opening the throttle on that side. The poping seems to come from cylinders 2 and 3, and happens all the way from idle through 2700RPM. The thing is, that's the side with the lower airflow (richer), 12 on the sychrometer, vs 16 on the right side at 2700RPM. Any ideas on what that could mean?

-Juan