i am using the plx dm-5 sm-afr combo and it is working fine, but i have hooked it up to the hondata s300 per their instructions and i am not getting a correct reading. i am getting anywhere from .84-1.36. the o2 reading under sensors is around 3.80 at idle. i have it set for air/fuel, plx sm series selected,d10 for the source. what am i doing wrong?

 

nobody?

 

Where do you have it connected to power and ground?