I bought used last year from a older gent who had since new. it´s in exceelent shape with 26000 miles on it. The problem is the after market cruise control he installed. He installed he told me and tryed to show me how to calibrate it after every 3000 miles. It will die below 2000 rpm after using the cruise. I have to turn it off and let it sit for about 10 min and then it runs fine. he gave me a calibration tool he made which looks like a board on a stand about 3 ft tall with tubes and hydraulic fluid in them . Any ideas where I can get info.