I plugged in my 00 cavalier this morning and ran a log on the way to work so i could do a little playing to see if i could improve the gas mileage, But for some reason i am unable to get any of the histograms to work. They all say unsupported.
I have tried loading defaults and clearing them out and only adding in one. I have them set on the main display for like knock retards and timing advance but they will not show in the histogram no matter what i do.