David
we run gas,when the engine was at idle it registered lean, 18 or 19 i believe but it was fouling the plugs.Someone in this post said we might have problems getting a correct reading do to the mounting of the sensor to close to the end of the header ''reverse air flow exhaust pulse''. Any how we installed it at the lenght from the port that was suggested. Maybe they were thinking collectors instead of single pipe. No mention of either in instructions,we will be calling tech.
I hoped we could look at this meter during a run to check if it was lean,if not continue on,instead of partial run, check plugs get back in line.
Good luck JL222