I'm trying to tune my timing. I've been trying to make a towing tune. I've tried to use the timing calculator. Posted in the forum here. With no luck I guess it works good for the pre 06. But when I try to use it. It turns the truck into a smoky mess. Pours out a stream of black smoke. Tried to adjust fuel with no luck. No mater which way I went. Basically put back to stock with a little upper top end advance. Runs clean. I know there is more power to be gained. With timing adjustment. Anybody tuning 06 or 07 with any tips? Thanks