hesitation and black smoke
I have a 2004 6.0 with about 40,000 miles. Till now I didn't have any problems but lately I have a problem with hesitation as I take off slowly from a light or if I roll on the throttle slowly and darker than usual smoke from the tailpipe. If I let off of the throttle and hit it again, it takes off with no dark smoke. If i punch it from the beginning, it takes off fine. If anyone has any solution or even a suggestion, I would really appreciate it before I take it to have it looked at.