as for the work out, it is my daily driver, about 25 miles per day. I tow a 25'camper in the summer time, I just put a plow on it this past winter and yes.... it got a good work out!!!! but as you all know it is a Beast!!! the rough idle problem could be many things, bad injector, bad wire harness through valve cover, the strange thing is that I am getting excessive pressure in my low pressure site fuel rail. I took out the stock check valve on the driverside for my Veg conversion. so I am guessing it is coming from one of the injectors on that side.