Truck Repair: Idle Speed, cummins diesel, dodge 3500

Question
I have a 97 Dodge 3500, 4x4, Cummins diesel. How do you adjust the idle speed upward?

Answer
Hi Tom,
I'm going to need to beg off on this question. I haven't gotten any experience on one of them yet.
I don't even know if it is electronic injection.
My bus at work with a Cummins has a screw to adjust it, but I wouldn't recommend just turning screws that go into the housing. If there is one out against the linkage or lever, try it.
Sorry, and good luck,
Van