Hello I have a 95 pathfinder "XE-V6 5-speed Man" and i have been having Tach\rpm malfunction i cant seem to find the root of the problem, most of the time it dosent even work, when it does it will jump all the way up, jump back then up and down realy fast and not work for an hour or a day. I was thinking it would be a sensor or wiring short. my odometer also stoped working about 2 years ago. if anybody has any suggestions or knows what i can do, please help.