Tacho/Revs dial works interimitently, why?

[GAZ666]

The needle on the tacho decides to stop working now and again, it does affect anything else engine wise....

What could be the cause of this?

[rx7veilside]

they are well known for either jumping or just not working ..best get a new or 2nd hand one ..mine used to jump between 3-4500

[Mave]

Make sure the live terminal on the battery is secure; whenever my rev counte rjumps it\'s because the terminal is loose, a jon for this weekend is sorting it out properly...

[GAZ666]

no loose connections......

buy what 2nd hand? new instrument cluster?

[Eddie]

When I had this problem I had to get a replacment tacho and just replaced it for the one that was dodgy, problem solved.
I think I may still have a spare if you want one, I shall have a look and let you know

Cheers

[GAZ666]

Yeah that will we cool if youve got one...let me know pls mate thanks