[Crisd]

Any one have this problem? Tach just goes dead while driving? Cause/solution??
Thanks - Cris

 

[ddouglas77]

I don't know the year of your spider, but usually the cause is from a bad ground or bad connection either at the tach itself or at the coil, now is the time break out the wet/dry sandpaper and start cleaning terminals

 

[scotta99fan]

If the tachometer needle was bouncing befor it failed, you have a broken tach cable.

 

[Crisd]

I have every thing disconnected and tach on my work bench, cleaning all connections. Will reinstall tonight... lets see...

 

[middo]

I have a bouncing tachometer (76 spider), so its just cable needs replacing? and water pump and drive gear should be ok?

 

[ghnl]

The cable is the likely problem. If it gets kinked/worn it tends to bind/release over & over again making the needle jump around. You can try undoing one end of the cable (usually at the tach end), sliding out the inner cable, cleaning it and re-greasing it. Dribble a few drops of oil into the outer sheath and slide the inner cable back in place. If you are lucky that might fix it. But if you see broken strands or a kink in the inner cable replace the whole thing.