Checking voltage potential differences at steady state with no Dyno is going to be tough. I thought when you're open loop the O2s will drift all over to whatever they please, they just don't switch. I have read that there's been a lot of issues with the new LC1s, but I hoped I typed that when I put my lm1 in its place and am using serial data. Any chance the factory settings in the LC1s need to be changed?