RE: E30 - Jumpy Tachometer

["Fadeev, Alex" <Alex.Fadeev@xxxxxxxxxxxxxx>]

> My Tachometer (RPM meter) jumps around from 500 to 800 RPM (on top of
> whatever RPM the engine is doing) during operation.
> Any ideas what might be causing this ???

Demetre,
	Has this just started or always been the case? When was the last
time you replaced SI batteries (http://cbsgi1.bu.edu/bmw/sil.html)? 
	Tach goes into 'jumpy' mode before dying completely when SI
batteries are getting low.

alex f

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