I don't suppose there is any way to change stoic in closed loop from 14.7 to a lower value is there? I thought changing the value under fuel>general>stoich AFR would do this, but it obviously doesn't do anything for closed loop as the ecm is looking at the O2's reporting +/- from lambda 1. (do I have that right?) Regardless, I changed stoich in this table to reflect 14.2, took a drive and the log shows a commanded AFR of 14.2, but my wide band shows a steady effort to maintain 14.7. So much for that brilliant idea....
I then got to thinking that if there was a way to change lambda from 1 (14.7) to where "1" really equates to 14.2 or thereabouts, that might help with cam overlap. It's my belief that the O2's are reporting a false rich condition and leaning the engine out beyond 14.7 at the combustion chamber from a reversion induced improper combustion event.
I have a strong preference to keep closed loop enabled, otherwise I'd just say screw it and run open loop. Where I live, I need fuel trims. I am more than willing to try any ideas and report back the results if anyone has any suggestions to offer.