Originally Posted by drunk on diesel
don't the aftermarket tuning outfits offer the same tunes no matter what the factory flash version?
The rollback for the ECM just rollsback the tuning to an earlier Ford flash. According to what I have read by Bill at PHP (Power Hungry Performance) the earlier Ford strategy that he rolls back to is a better programming platform on which to build the custom written tune, resulting in a better end result. The FICM tuning is basically the same concept, with some programming modifications. Having both is supposed to result in better power delivery and is easier on the FICM which could lengthen its overall lifetime and result in a gain of 2-3 MPG.
These are the reasons why I am contemplating getting it done.