I am from Florida so by cold I mean below 60deg.F. Started the end of last winter, tach and speedo jump all around then fall dead repeatedly from start up until temp gets above 60 deg. as long as 2 hrs.Spent $400 last winter to replace the little box that the codes said was bad ,it lasted about a week and did the same thing Everythig else works fine when this happens just no tach or speedo. Any ideas? Thanks for looking.