I have the Silver Leaf that connects to the diagnostic port at one end and a netbook on the other. Recently it has sometimes added a lot of miles to both trip logs for a while (making my fuel economy look great), then corrects itself after a while. Another time it showed a nine figure number for fuel consumption )making my mpg zero), then corrected itself. It could be a diagnostic port problem. (The numbers on the Aladdin Jr are ok, but it does not connect through the diagnostic port.) It could be a problem in the Silver Leaf cable, and since it lays on the dash it might have developed an internal break that I can't see. If it's a problem in the Silver Leaf software, I've hit something rare, because the same software has been in the system for years. Ditto for the netbook.
Has anyone else encountered this? If yes, what was the fix?