I have the edge on my 4.6 and i wanted to try it on my friends 4.2. I know its not supposed to work but has anyone tried it. Thanks

 

If Edge doesn't support it, it means they have not/will not write a program for a 4.2 PCM, so the tuner will not find a known hex code and will not program the PCM.

It will only program PCM's with hex codes for which Edge has specifically programmed. That is why folks with the newest PCM codes have to wait until Edge gets their hands on the particular stock program to then create the tweaked programs.