Hey guy's I have a 51, 235 in my 52 1/2 ton. It runs great,(other than the lifter than bleeds down overnight). Question is, why is my exhaust so sootie. It is black and powdery. I can almost sweep it up. It doesn't matter what I do to the mixture and timing. Any ideas? The truck doesn't smoke but does leave a black deposit on the floor.
Glenn,
