Hmmm... Can you confirm blue (usually oil), or maybe it is white (usually fuel)?I've searched out this and didn't really find what I was looking for. My truck has 25,XXX miles on it and puffs blue smoke when driving. Only does it within the first 5 minutes of actual driving (not sitting idling) when I'm going down a gradual grade. When it is occurring my mini maxx says my throttle position is at 3-5% (just enough to keep the exhaust brake from coming on). It started doing this when I was running my smarty, but still does it with the new tuner. No excessive smoke at WOT (actually almost none at all thanks to MCC) and doesn't run bad either. I've checked the turbo and have a little side to side play( you can definitely feel it ), but no in/out play. All the fluid is normal as are my gauges. Not sure if it is indeed a turbo issue or something else. I just don't want to ruin a motor that isn't under warranty:doh:
And it does not do it when fully warmed up, nor at idle? And I assume the smoke lingers a long time?
Gotta get a better idea of the situation before I could theorize whats happening.