http://www.wellsve.com/ This 2002 Ford Expedition has no codes, but the owner complains he can feel a misfire under a heavy load. While power braking the engine, you can not feel the miss. On a test drive going up a steep hill you can feel the complaint. It feels like one cylinder is misfiring. But which one? You have a one out of eight chance, or you can use your scan tool in mode 6 to try to pin it down to a cylinder. This video shows you just how to do just that on this vehicle.