I am new to tuning and trying to learn as I go but I dont want to hurt the engine doing it. I have a V1. The main problem right now is that the commanded afr goes to 16.8 and sends my wide band to 17 or so. full lean at about 30% throttle. The car lays down and stumbles.what am I doing wrong? it runs rich the rest of the time. this is the first time I have driven the car after installing a 6.0 with ls3 heads and intake. Please bear with me while I try to get this figured out. thanks guys.