Ok, I pulled this up in MLVHD, and I'm starring at it trying to figure out what this is telling me..... Here are my assumptions:For things like those you dont want to look at one instance, you want to use the entire log file. Transient events can cause the o2 to read strange numbers.
Try using the histogram to point out fuel issues over large areas.
The color is how "often" the car was operating in that range, so dark green was where I was most of the time, light yellow was just for a second or so....
The number is how high or low on average my AFR was vs AFR target? So at 1600rpm at 100kpa, I averaged a full 2.75 points lean vs my target AFR?