rough idle

Before I take it to the dealer for warranty work, just thought I would check out real world experience here with the experts. CS2220 with 115hrs 7months old all of a sudden (engine running fine for over an hour at operating temperature) started smoking (white) with definite un-burnt diesel...

All-- I have a Mahindra 5545, 4wd. Today, it ran very well earlier, but when I started it to do a little backhoe work it began smoking from the exhaust and running very rough and would not produce any power. This happened a couple of years ago, as well. Back then, I had made up my mind to haul...