New to forum and hoping to get some insight from time to time. Recently picked up an 01 ram 1500 sport 4x4. Really like the truck. This is my second dodge truck (built a 77 powerwagon in my youth). Only have one quirk with truck and hope I can find some help from the community. Truck has recently started idling irratic (reving up and down) at stops. doesn't do it all the time, but when it does, it bounces up and down a few hundred rpm's. Cannot find a vacuum leak. Truck has a new 360 crate motor in it with less than 5000 miles on it. Ran great for the first week of ownership and now this has started. Any ideas?