case 450 dozer low power

i have a late serial number case 450 w/207 diesel. 1900 original hours, one previous owner used machine for finish grading residential construction. the engine starts unbelievably well, even after sitting for months. it has new injectors.

i feel the engine runs "sloppy". it blows some black smoke under acceleration; in neutral or when turning the tracks. it is "skippy" at high idle, and blows a black/grey smoke. it does not have the power to steer itself when going up hill, it labors to...

case 450 dozer low power

case 450 dozer low power