strange..
you said "total change" meaning total change in gas or total change in the way it's acting?.. Mine was a total change as well, except it was a good thing (minus the cold starting fiascos), but it runs like a beast during driving now (which it wasn't.. it was wanting to stall in several of the power curves.. almost like it wanted to "limp", but didn't quite get to that point)
remember: I didn't come up with this "solution".. it was the good folks at "866-ASK-MINI"..

(just to cover my butt..

)