Hi y'all. So my 98 2500 has all of the possible cylinder balance codes available. The codes are p0263, p0266, p0269, p0272, p0275, p0278, p0281, p0284. The truck starts and idles fine then after a couple of minutes it starts to run rough like it has a miss. You rev it up just a little and it runs smooth again. All the while it smokes. It has no power and black smoke out the pipe. My question is why the codes and is the wastegate open with the lever up or douwn. Thanks in advance guys.