why is my tach bouncing?

[yozsi]

for some reason when i go over bumps in the road my tach likes to bounce a little, its kinda annoying when i see it bouncing up and down about 100-200 rpm's. the engine doesnt misfire at all and it bounces even when i tap on the dash above the guage cluster. just wondering if the guages are known to break solder joints or something?

 

[SonicRiot]

Most likely the clockspring in the gauge is no good.

Erratic signals such as a bad CPS can also cause a bounce, but because tapping the dash changes the reading, I'd go with the first possibility.

 

[yozsi]

crud, so just live with it? or swap clusters? i know its not ignition because it does it when i tap on the guages too.

 

[1stSHO]

When going over bumps, dont look at it!!!!

Now was that hard???? :corn:

 

[etc1006]

Don't go over bumps? :laugh_ti: j/k If it really bugs ya, replace the cluster, I don't know if you can do just the tach in these cars or not, like the Mustang...

 

[SonicRiot]

There's always an aftermarket tach...