I've been fighting this tune for a while now. The low load STFT's are always in the -11 through -15 no matter how much I keep subtracting. While logging today I noticed while I was in those cells, that the 02's were flat lining. I can hold it in that cell, watch the 02's flatline, and then the AFR slowly goes from stoich to blubbery rich.


I caught some pretty good scan's of what's going on if some of you experts could take a look.