is there a sending unit that could be bad maybe a wire lose. Mmmm? there is a guy on another forum that i talk to that may make some good suggestions. the forum is www.atv-forum.com. he is pretty good at these types of problems. Sorry for recommending another forum but he may know. HOpe you get some luck some where. by the way his name is saber6. he is now apart of this forum . good luck.