I have an 87 turbo t-type with the only mods being jay carter 28-93 chip, walbro hotwired fuel pump, 3 inch mass air pipe and 2.5 inch exhaust. I run nothing but 94 octane in the car and yet I'm getting detonation at only 8-10 lbs of boost....Has this happened to anyone here? I don't have a scan tool yet and I don't really know where to start looking. Is it possible the chip is giving me too much timing? Can I just pull the chip out? Could it be a bad plug? If I can just pull the chip where is it located? Sorry for all the questions but I'm new to turbo buicks and I'm still learning..Thanks for your help....