tractor was rebuild apx 5000 hr agao new all new wire harness was done by cat dealer at that time remaned all ecms since that time cat has replaced 5 yes 5 engine ecm all have given different problems . have had 3 different techs work on it all cat field service . I feel we are fixing the problem but not the cause .told them Friday no more reman ecm . will try a new one next week . but feel we are missing something . any one had this problem