Getting ready to install a 5c converter . I've read multiple install threads in which none mentioned doing a crank relearn . I received my tune yesterday and in the email it said to make sure I do one once the converter is in . I have a x3 so I would have to go to the dealership for it . How many of you had to do this after a converter ? If I do indeed need one , do I do it before I load the new tune or after ?