[Jkrssll]

I just purchased a 1993 2500 Turbo Diesel and the oil pressure needle bounces a little bit back and forth. On top of that, the exhaust is blowing quite a bit of smoke once warmed up. I knew of the problems when I purchased the truck (I got it pretty cheap) and was just wondering what I need to do to fix it. The truck has 404,000 miles on it and runs strong. Just have to sort out what is happening before i start to drive it.

g. Any suggestions?