Howdy from Nashville

Need some info about the fuel rate adjustment screw on my 1985 300D TD. Which direction is lean and which is rich. It smokes badly in has no low end power but runs great on the interstate. It seem to be getting too much fuel.

My "experienced mechanic" messed up the fuel adjustment. I refuse to pay him any more money due to the fact that it runs worse every time he touches it. My neighbor is a good mechanic who works long hours. I hate to bother him but he offered to help out.

Wagonhorse