What the engine "needs" is gas...the more you give it, the more it goes. Thats the way it is whether the pcm is controlling it or you are. The difference is that the computer is dumb in a way, it can't adjust for changing conditions. All it thinks is "truck is slowing down, add gas to stay at preset of 70mph". So, if you hit a big hill, the pcm will give it as much gas as it has to to try and hold 70mph. A person on the other hand can see an upcoming hill and plan according, slowing down etc. Besides, I use my right foot. :anitoof: