Speedo problem, The EHC was flashed several months ago to reboot after starting, this fixed the speedo not working issue. Things were working fine until yesterday, Took trip in East Texas and about 3 hrs into it I was moving about 85 mph and all of sudden the speedo dropped to 60 then back up and down. When I give it throttle the speed drops down. Also sitting still in neutral and rip it up, the speed goes up to 40 or 50 sitting still. any ideas?