[DML] Re: Tach Twitch
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[DML] Re: Tach Twitch

One thing that can cause this is if the trigger/stator air gap in the
ignition distributor is improperly set.  This is kind of rare, though.
   You should be able to do a search to find more info on this.  The
appropriate gap setting is in the service manual, and can be checked
with a feeler gauge.  


--- In dmcnews@xxxxxxxxxxxxxxx, "Ryan Wright" <ryanpwright@...> wrote:
> Short story: My tach has recently started "twitching". It seems worse
> above 3000rpm. Doesn't matter if I'm moving or stationary. The tach
> will move up ~300rpm briefly, then drop back down.  No change in the
> engine, it seems related to instrumentation (though I don't think it's
> the tach itself; the twitch is present all the way back at the idle
> controller, so unless the tach is feeding back on the signal from the
> coil, I'd guess this problem is with the coil, idle controller, or
> something else on the line).
> Any ideas?
> ---
> Long story: A few months ago I replaced my stock alternator with a
> 180amp unit in preparation of participating in a parade. There was
> nothing wrong with my stock Motorola, I was just tired of the lights
> dimming at stop signs (especally with the A/C running). The new
> alternator did fine on my 2 hour trip, but died completely after I was
> there. Shop that sold it to me said the regulator blew (and tried to
> blame it on me, but that's another story).

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