I have an 06 3500, 5.9 w/ Edge Juice. Truck started to accelerate when the speed dropped below 5 mph. Once it reaches over 5 mph the truck runs fine. Noticed it when I came up to a stop sign and the load % on the programmer begin rising and had to hold the brake to keep the truck from moving forward. Truck jumps forward (and in reverse) until you go over 5 mph and then the acceleration stops and it runs perfectly normal. Anyone have any ideas what may be causing this?

 

I don't know if this applies to you, but I have noticed that my brake pedal wiggles left to right about an inch. And a lot of times when I step on the brake, my foot hits the accelerator as well, and sometimes scares the s999 out of me!! I thought the truck was surging on it's own, as you can't tell it's your own foot causing it. I have the adjustable pedals, and some kind of bushing allows my pedal to swing left and right like a pendulum. I brought it to a dealer, and they gave me a story about not knowing what is wrong, and having to tear into it to determine the problem. They could not give me a price.

Again, Probably not the same problem, but maybe??

 

Just a thought----I have a diablo on my 5.7. One of the options is to raise the idle speed whenever the a/c is on. Mine has a stick, so higher idle is no problem, and it helps warmeup on cold mornings---just a thought