[V8] Tach dropout?

[Buchholz, Steven]

... have you noticed any apparent loss of power in the engine when the tach misbehaves?  When the engine speed sensor on the flywheel is starting to go you will see the tach drop.  

It could also be that the tach itself is flaky ... 

Steve B
San José, CA (USA)
> 
> I have done the "standard" gauge cluster fix to remedy the fuel level and
> coolant temp drop outs but now have an inoperative tach.  Is there another
> fix for this symptom or do I need to check elswhere?