Quote Originally Posted by Cuppa View Post
I could be way off the mark here, never having owned an RD28td - but I'd wonder if it has anything to do with driving it at 120kph. @mudnut will know if that's reasonable for this motor, but I'd imagine it'd could be revving it's nuts off. The black smoke may simply have the same cause - heavy throttle foot. As far as I know these revvy motors were no speedsters & it may just be that you are asking a little too much of it???
Yep way off the mark..... These engines like to rev..... As far as the issue goes, I have no idea sorry