I just got my 600 back from the deal after complaining about all the white smoke and rough idle at start-up.
What they found is that 2 of my injectors were slowly bleeding off into the cylinders after shut down. This problem took 3 or 4 hours to develop. Which explained why the problem was really bad in the mornings. It took the truck about 45 seconds to burn off all the excess fuel.
They replaced the 2 injectors and the problem is gone. No more white smoke or rough idle.
What they found is that 2 of my injectors were slowly bleeding off into the cylinders after shut down. This problem took 3 or 4 hours to develop. Which explained why the problem was really bad in the mornings. It took the truck about 45 seconds to burn off all the excess fuel.
They replaced the 2 injectors and the problem is gone. No more white smoke or rough idle.