I am currently looking at picking up a used 2015 F150. Having done a good amount of research around this forum, the problems with the first generation (11-14) of ecoboost are readily documented. What, if any, changes were made to the 3.5L ecoboost for the 2015/2016 model year? Anyone with 2015/2016 ecoboost issues? Have they addressed the condensation buildup in the CAC, timing chain stretch issues, or the intake valve coking issue? I have read around the internet that 2017 was the official mark for the 2nd generation of the ecoboost, what changes were made for 2015?