part-throttle tune my car with hondata s200b with plx300 wideband. the problem was that the a/f readings on the plx was difference to the readings on the hondata screen. also the plx wideband sitting was chosen on the hondata wideband sitting. which one should i get it tune to? the #'s are way off and dont come close to eachother

 

always trust the wideband display over an analog output reading thats been interpreted by the program. You could have the settings in hondata wrong or some kind of grounding issue.

 

hondata have a setting for wideband but it dont read the same. what gounding spots can i look for so i can get the readings alike.

 

slightly change the lambda conversion table values until the reading on the wideband and hondata display comes as close as you can get it.