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my understanding is that adaptive learning cannot be turned completely off, which is why most tuners recommend periodically reinstalling your tune to refresh it. Adaptive learning will dumb it down over time.
The spring mod is a bad thing and could have been the root of your problem.
What the hell is it!????[:@]
It's this. As I recall, nobody who actually did the mod had a problem. But one very vocal person who didn't do the mod swore up and down it was Mustang doom.