I have the juice and CTS. when I first installed it I noticed surging at a lite throttle went accellerating. I called and they had no answer. I just put in new injectors and have not noticed the surging. The only thing that may have improved. With the juice, injectors,,AirDog, and a cost of nearly 4grand, I have not gained any fuel economy. Power is not an issue. Not what I was after. Now if I set it up to 2 and step on it, it moves out, but egt's jump past 1340 almost immediately.