I am having problems with my tach in my 02 sentra SE-R it reads idle but as soon as you give the car any gas it drops straight to 0. My ? is. Is this a tranny problem or my guage cluster or just a loose wire I need to find somewhere. Anyone who reads this plz help if you have any ideas

 

sounds like a loose connection or corrsion build up on the harness plugs or pins for the tach.

 

Thanks appreciate the help.