It was actually running fine- well, same as usual anyway. I stopped at the store in Blue Ridge and got a bottle of water and an ice cream cone. When I started to leave the engine light came on. I cut it off and restarted it to see if the light would go off...it didn't. Turned the little knob on the dash to see what the fault was and it said "delta pressure". I'd seen that one before, but I couldn't remember what it meant. So I pulled off and figured i'd call Jeff to see if it was important or if I should keep on riding- as soon as I finished the ice cream cone that is. He said to run it by Truck Enterprises and let them check it, and that's when they found the issues. I was upstairs watching Swamp People when the service manager came in wanting to know who to call... I don't remember the exact date, but i'm thinking it was just last fall when they put a turbo on that truck at Truck Enterprises in Keyser, W.V. No doubt about it that time, it went out with a big boom.