Tach is Fixed

Good news on the tach.  I took it apart and a screw fell out.  There's a little circuit board on the back of the internal assembly held on by two screws that were apparently never tightened.  And, of course, that circuit board is what holds the whole assembly in place in the case, so it made for a bad situation when one of those screws fell out.

Both screws are now secured with a drop of Loctite (I'm developing a fondness for that stuff) and should be solid now.

Huh?  Oh, you want a picture?

Driver's Eye View

Ignore my messy workbench.  The little blue display behind the steering wheel is a ScanGauge II if you were wondering.  It's a nifty little gadget that lets you read just about anything that you can get from the OBD interface, plus some calculated parameters, like MPG.  The silly car has no temperature gauge, so the main reason I bought it was to be able to keep tabs on coolant temperature.  It's proven to be useful for adjusting driving habits for better fuel economy, as well... among other things.  When I get around to messing with a cold air intake, it will show me air intake temperature, so I can gauge the effectiveness of those efforts.  Oh, and it can read and reset error codes in the ECU.