What is the proper way of hooking up the wire for the plx? I use the power and ground from the center console of a eg and connect the white wire to the ecu. While doing part throttle tuning on my car. The a/f on my plx and dyno a/f will be similar, but the WOT tune is off by 1.5 a/f.. I dyno at 12.0 a/f and my plx read 13.7. Anyone have similar problem like this?? The a/f on the s300 is off to the 2 also. When one should I believe??

 

i believe im having this issue myself. i figure it was just a bad sensor. but maybe im wrong.

 

I'm having the same issue with my Innovate unit, actually.
Wiring and offsets are all correct per Innovate technical support. Also tried 2 sensors and ran numerous calibrations on it as well. Still nothing an Innovate is not helping anymore.

 

My sensor is a couple month old only... Cause i thought my old sensor was bad. I don't think plx m300 have calibration..I just purchase a o2 that plug directly to the dyno. I hope this will get me more accuracy reading when I tune my car.. Will test it out this week.

 

Hooking up your o2 with the s300, you have to change the o2 offset to match the plx box display so the s300 and the plx will match. I forget it exactly, I haven't messed with hondata in years

 

Yes, even when I have that done to as close as I can. The a/f will still be off from the dyno wideband.

 

You said all 3 were different

 

Yes