So I'm having an issue. I recently bought an 08 6.4. Initially when I bought it, I took it out for a spin and came back, turned the ignition off and it kept running for a minute or two and was told it was an aftermarket turbo cooler. Now when I turn the truck off it kills everything altogether. Anyone have one of these installed and can point me in the right direction? It also has an edge performance programmer. The programmer itself illuminates but I can't read any of the lettering. I think I may have turned the turbo cooler off accidentally while trying to get the programmer to display words. Excuse the simpleton mentality but this is my first diesel so hopefully its something super simple. I appreciate the help in advance.