I am working on a friends 2004 LB7 with DSP5 and all the tunes even the stock tune are real unclean. At lower throttle percentages it haze a slight haze coming from the exhaust even while idling you can sometimes see it. About 2,000 miles ago I did a head gasket job for him and in the process noticed that all of the injectors were clogged up half or even better with grit. After cleaning and putting everything back together i could notice a little more noise coming from the injectors but the truck still runs very strong, but it looks a little junkie going down the road spitting out smoke. I have checked the intercooler boots and tubes and nothing has caught my eye. Cleaned the MAF sensor and air filter and still nothing. He had run a smoke tune as his base tune for about 3 or 4 months and recently i have been trying to clean it up. I have had some luck but it's kind of got my that the stock tune is smoking. It might not be with the tuning at all but if anyone has any advice or comments it will be very appretiated. I am only 17 so i have alot of learning to do still but i am startring to grasp it more everyday.