hey i have a 12v 2500 97 auto . i was blowing gray and white on start up and when it was cold i put new injectors in it and they were from a manual.. well it now seems to bog down like before and have no higher rpm power. i have cleaned the air filter its a k&n filter the turbo seems more responsive now but still doesn't go anywhere. once you get going it blows black and has no power. i havent driven it lately due to the fact that it wont accelerate at all. my old injectors i had the holes in the side of it where 3 times the size of the new ones cause they got all blown apart. all the hard line from the pump were pretty clogged and well its still have the same problem . i hear the turbo slight go then nothing

 

Change your fuel filter. Always a good start.