Need help with bouncing tach needle...

I was driving one day and all of a sudden my tach just shutt off…but then i turned off the car then it came back…Now when I drive it jumps ahead sometimes like about 200-300 rpms seems like the needle is loose or something…How can i fix it??The motor runs perfect just the tach moves around and its annoying so help it would be greatly appreciated thanks…

I’m gonna bump ya, cuz I too have a similar problem, only mine is on an autometer monster tach.

There is an article on this topic in the Tegtips. Search around and you might find what you need without anyodys help.

http://www.g2ic.com/tegtips/engine/10.html