[lionis335]

I have a automatic 335 e90 2008 and I bought from my friend 1 year ago his jb4 and everything was working perfect,I always drive on map 5 because I have intercooler ,full exhaust,intake,down pipes and blow off Valve .Yesterday I was runing in the car and when I press the 3 gear it lost power ,,and now everytime I run all the gears are perfect but when I put the 3 it lose power I can feel.I call a friend that he works on active autowerke and he told me to put the jb4 on map 0 to desactive it and then I race the car and in 3 gear I did not feel any problem ,so he told me that the problem was coming from the jb4.Please I need your help .