Been doing quite a bit of tuning lately and im struggling with my own car with the E40 pcm its an 06 GTO. Its a moderate cam in the car 226/234 .600 112lsa. Runs pretty well but its not perfect, unlike the ls1 cars theres no throttle cracker or follower and i cant seem to find my direct and learned airflow PI modifiers.........does anyone have suggestions here or am i just looking for the wrong thing? LS1 cars i get to run perfect but this one is killing there a different OS i can load in that will give me access to these parameters? any help would be appreciated....i still have a hair of very light throttle surge here and there below 1800....seems like it needs more throttle cracker and folower but i cant find it lol