ISX CM 570 BLACK SMOKE

[madcash2]

Hi All, i have a CM 570 ISX, driver has been complaining of high consumption and black smoke. I did an overhead set to spec and found some injectors were not set right. Before the overhead set i did a leak test on both front and rear banks and they passed. After the overhead set revved engine to maximum and the smoke cuts out and exhaust is almost clear but when he truck drives still get a bit of black smoke. Though not as much as before. What else could i check. Thanks