ok those gagues the narrow band will tell u you are running lean untill u release the throttle then it will tell u rich TBH there not all that good. so u could be running rich and the gague is sayin lean.
My mate has the exact same gague and we was setting in RRFPR up it woulds always say lean even at 4.5Barrrr untill i noticed wen he released the throttle it would shoot round to rich so after we adjusted the RRFPR down it would just go into rich just after optimal. Got a wideband and it ran in the 10s. with same set up. Just my experiance