[soutthpaw]

The issue was with the diesel engines not gassers.. It wasn't even a hot tune from what I understand and being you cannot access the files and look there is no knowing what the issue was. I don't know enough about the specific problems to know if it was the tune or other factors though... probably a contributing factor at minimum .... guess u could search the FTE or Powerstroke forums and find plenty of posts on it. Lemmings could go both ways... everyone who blows their engine with that tuner's chip automatically blames the tuner.......

My guess though is probably a timing and fuel combination issue... if combustion starts too early (gas or diesel) you are pushing the piston in the opposite direction its supposed to be turning... this is what octane prevents in gas engines. Thus you are going to snap a connecting rod and blow it out the side of the block.... being that the problems were specifically block windowing (a big hole in the engine block) occurring on multiple vehicles, you can look for a common denominator(s)....