So I read where a guy adjusted the CC on his IDI so it was not able to apply as much throttle. I searched, but couldn't find any information on how to do this. I am wanting to adjust mine so that it will allow some speed variation in the rolling hills around my home. I am thinking that reducing the throttle inputs will help with my MPG and I don't mind losing 5mph during a hill and regaining it at the top. If I was really concerned about going as fast as possible I wouldn't be driving an E250 Diesel van. Thanks