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Re: [Healeys] Erratic Tachometer

To: "'Alan Seigrist'" <healey.nut@gmail.com>, "'Len and/or Marge Hartnett'" <thehartnetts@earthlink.net>
Subject: Re: [Healeys] Erratic Tachometer
From: "David Porter" <frogeye@porterscustom.com>
Date: Mon, 19 Aug 2013 20:32:44 -0600
Cc: 'AH Mail List' <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <AB17536D940F437E8CD622A8B1701AF1@LeonardPCPC> <CAFBXTkK5Cw5N=RYTca_FC+NGTgvJsPQmmLQoFM5Lmv=0qQGnGg@mail.gmail.com>
Thread-index: Ac6dTHgy3xLb10LIQw69QLIHgrX8hwAAQrmQ
Add a voltage stabilizer?
dave

frogeye@porterscustom.com

Porter Customs   2909 Arno NE
Albuquerque, NM USA 87107
505-352-1378
Porter Custom Bicycles

1970 MG Midget

 

gallery:
http://picasaweb.google.com/porterscustombicycles/PorterCustomBicyclesStuff

GO HERE: http://porterbikes.com/  nice pictures-fun facts-my world

-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Alan Seigrist
Sent: Monday, August 19, 2013 8:23 PM
To: Len and/or Marge Hartnett
Cc: AH Mail List
Subject: Re: [Healeys] Erratic Tachometer

I had this exact problem for many years and discovered that the wire from
the coil to the tach to the ignition (white) has a huge amount of
oscillating current, and as a result all the connections on the wire had
built up surface corrosion.  I cleaned it all up and firmly soldered all
the varios connectors, never had a problem after that.

On Tuesday, August 20, 2013, Len and/or Marge Hartnett wrote:

> Not sure this was received by all on The List as it went out as Rich Text
> (HTML) although I did receive one response to check the coil and condenser
> (I have Pertronix).  I'm trying Plain Text this time
>
> My BJ8 tach has become erratic (not erotic although the needle is doing a
> great shimmy and shake).  In 2004, it was steady but incorrect.  I
replaced
> the C2 capacitor per article by Frank Filangeri (can be found on John
Sim's
> web site) and that solved the inaccuracy problem. Now it fluctuates
> constantly by 100 or 200 rpm.  There are two other articles on John's site
> one of which (author unknown) recommends replacing virtually every
> electronic bit and piece in the tach.
>
> I can not find anything in the archives specific to my current problem so
> therefore my question is:  will replacing only the C2 capacitor solve my
> erratic needle problem?  Is there something else I should check first?  I
> do not relish the idea of replacing eleven items one by one and having to
> reassemble and test each time.
>
> (The Other) Len
> Vacaville, CA, USA
> 1967 AH 3000 MkIII, HBJ8L39031
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