Ok so the car is a 2006 cobalt ss/sc with a zzp turbo swap. s256 turbo running off a tial wastegate no boost controller and a liquid to air cooler. Maf is a blow through setup and has a lk9 saab intake mani with a 2.4l eco throttle body. On 10psi at only 6krpm (42#injectors) Car made 23xwhp. Problem is when the owner leaves and drives home car enters into limp mode every time. I drive it and long it on the street or the dyno and everything runs fine. No idea what is going on here. Is the 2.4tb the issue, blow through maf or something else. He comes back monday and i will post up logs and the tune file. but it wont help since it wont enter limp mode while logging.