I have a 2006 ram 5.9. I spend winters on the Texas coast(sea level) and the summers in Gunnison CO (7700 ft asl). All is good at sea level but at 7700 ft I get serious black smoke just driving around...
All kidding aside we had to replace an bad injector (actually replaced 3 injectors)in our Dodge truck last year due to an increase in smoke and engine rattle at idle.
