When I got the truck it already had efi live on it. It had unbelievable power. Then one day I got on it pretty hard, it turbo barked bad! Since then it's been acting dogish I guess is the way to put it. It doesn't have the ass it used to have when the turbo lit. Shortly after that day the turbo went out tore it down put another IHI in it, cleaned ic pipes, flushed ic, new oil, filter, coolant, fuel filter. I still have the same power issues. When I first got the truck it wouldn't smoke black at all on race tunes, now it smokes. I'm beginning to think its the tunes, every once in a while I will get on it and the ass end will kick sideway. Anyone ever had any experience with duramaxtuner.com or have any ideas?
