EGR Issues 870

[rtjohnson1982]

Following up on my previous post about my never ending EGR issues, so far I’ve replaced the EGR valve with a new Cummins one after the aftermarket egr failed after 4 months along with replacing the differential pressure sensor. Now check engine light is off and truck appears to be running better but when I’m pulling any amount of load it blows black smoke worse than I’ve ever seen! I can unplug the EGR and check engine light comes back on but black smoke goes away almost entirely. Any help would be VERY MUCH appreciated because I haven’t had any luck getting anyone locally to pinpoint my issue. 2007 Cummins ISX Thanks!!