I purchased a 2001 Jetta vr6 with the 2.8 about two months ago. We were told it just needed a water pump and coil packs. We put those in along with new radiator, freeze plug, thermostat, injectors, plugs and wires, and new coolant hoses. We have done so much to this car and it still sounds like a diesel when it's running and continuously over heats. We thought handbasket but we don't have any oil in coolant or coolant in oil. It's passed a compression test. The only code comes up is a Cylinder 3 misfire We've checked everything for number three and it's working. I am not sure what to do next. Does anyone have any ideas??