i try changing my blms and they keep going back to default. I don't know much about the scanmaster yet just got it today. My o2s are reading in the high 5oo to mid 600s at a idle and i know i am running lean. I have the new walbro 400 pump and hot wire also. base line fuel is 45 with line off. im on a pump gas tt chip set for max boost on 50lb injectors.