I started having problems when i downloaded the new s300 software, it spits and sputters like im leaning out. the car ran fine with the old software. i did get the car tuned by kingmotorsports who specializes in the s300. After the spit and sputter the car runs like shit, it boggs then kicks in. I called the people that tuned it and they said it shoudn't do that. the program should just update. i tryed updating the firmware and the usb (nothing) HELP
97 H22a4 17lbs
sc61 turbo
13.6 1/4 mile with bfgs