captncraig

The tach on my 82 rx7 still moves, but its very wierd. I t jumps around alot. Sometimes it is somewhat representative of engine speed, but reads higher. When I put the clutch in, especially from 3rd to fourth, it jumps to like 5000 and hangs there. The car seems to drive fine. But i have no idea how the tachometer works or how to fix it. Thank you for your help.

Rx-7Doctor

iTrader: (13)

Could be that your trailing ignitor is starting to go south, try switching them and see if that makes any difference.