surg in power

[6 liter coolent eater]

ok guys got a question for you what would cause a surge in power when under a load like going up a hill truck started doing this today on the way home from work when it dose it its huffing black smoke other then that it drives and runs fine?

 

[Big Angry Hillbilly]

EBP sensor or tube, EGR valve sticking, turbo vanes sticking, could be a number of things. Codes?