[Mg-t] Fw: Ignition problem - I think!

[John F. Quilter]

I would also suspect the rotor.  I had this exact same problem a few years 
ago with my 1965 Jaguar sedan and it was a shorted rotor.   I have heard 
that there were a batch of bad rotors out there that would suddenly short to 
ground via a rivet holding the brass contact in place.

John Quilter
Eugene, Oregon

----- Original Message ----- 
From: "Ted Jackson" <ted at the-jacksons.ca>
To: "Douglas Ormrod" <Douglas.Ormrod at neurological.org.nz>
Cc: <mg-t at autox.team.net>
Sent: Wednesday, November 30, 2011 8:51 PM
Subject: Re: [Mg-t] Ignition problem - I think!


> Try replacing the rotor. It has happened to me and one other that I know.
> The rotor can develop a pin hole short. Too small to see that just route
> the electricity straight to ground (earth).
>
> Ted Jackson
> On Nov 30, 2011 11:34 PM, "Douglas Ormrod" <
> Douglas.Ormrod at neurological.org.nz> wrote:
>>
>> Hi T people
>>
>> Last weekend my 51 TD, which has been very reliable to date, started to
>> suddenly  miss then died altogether. I suspected ignition as the pump was
>> ticking away - but could not find anything obvious so got towed home.
>>
>> I have since cleaned and reset the points, fitted a new condenser and
>> distributor cap. There is a spark on manually opening closing the points,
> but
>> does not seem to be a spark at the plugs - with one removed and sitting
> on a
>> bright spot on the engine while it turns over. Engine does not even
> attempt to
>> fire. All connections seem tight and the wiring was all renewed on
>> restoration.
>>
>> The only old bit in the system is a 1973 Lucas TA12 sports coil. Should I
>> suspect that? How do I test it? I can't remember  - should it be a
> Ballast or
>> non-Ballast type coil. I have a couple of other coils a Lucas 8C12 
>> Ballast
>> type and a HA12 fluid cooled type - and a Delco Remy 115043. Guess I
> could buy
>> a new one and try that - but would like to know if the coil is at fault
>> first.
>>
>> Any other suggests for fault finding gratefully accepted.
>>
>> Thanks
>>
>> Douglas
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