ECM tuning would be anything like an SCT X3 with custom files or the regular tuners. The FICM
has to be sent out to get tuned. I believe PHP has some programmers that can access the FICM
but I am not sure. Otherwise I believe Elite and Innovative offer FICM
There is a bunch of info on here about it and it does seem to improve things quite a bit by opening up parameters and giving finer tuning of the injectors themselves.