I currently have the Rtek 2.0, a tungsten T3 and a PLX wideband. all the features seem to work fine. (I am new to the Rtek) I have been reading up quite a bit to start tuning. When I try to log the wideband. I get a steady value of 20. when I turn on/off the wideband via switch there is a spike down to about 16. then returns to 20 so im pretty sure its wired up properly (using atp input) the problem seems to be when I enter the offset and multiplier, ref1 & ref2 I exit the window and they don't seem to save? Any ideas maybe something i dont know yet? Is Rtek 2.1 software compatible with the 2.0 ecu?

 

i had the same problem. make sure you are using the correct screen, the calculator doesnt change anything its just a tool.