Thought I'd pass on some info I received from V&H if any of you have this brand of fuel management. I have the older model. I was getting lean surges. Typically they won't let you know what each value is for. The first 4 values on the system get set as 0. 1-4 are all zero. Changing 1-4 to value 5 increases fuel flow slightly thus no more lean surges. Maybe down the road this will help someone somewhere. Toodles.