This is not my car I’m talking about but asking for a friend. He has a 2017 fiesta st he just bought with 70k miles . and as far as I know it’s tuned on93, has a 2jr intake setup , a guardian angel map setup, a upgraded inter cooler , borla exhaust ,and miscellaneous cosmetic parts . Car runs fine and pulls 23.4 psi at peak boost. After 100mph every time the check engine light comes on for a misfire in cylinder 2 . We changed out for new spark plugs and coil packs . Any ideas ?