Clear Glass ceramic on spark plug?

**[email protected]** · #1 January 1st 17, 09:42 PM posted to rec.autos.tech

On Wednesday, January 1, 1997 at 2:00:00 AM UTC-6, Tim Shih wrote:
> Does anybody know about a clear glass insulator spark plug?
> I think i heard about it somewhere.
> supposedly, the theory is that the "spark" is visible though
> the glass to determine if all cylinders are firing.
>
> how come no one knows what i'm talking about?
>
> thanks
> tim

don't listen to those armchair experts.

here ya go.

http://www.autoexpertproducts.com/colortune-12mm.shtml

**Kevin Bottorff[_3_]** · #2 January 2nd 17, 07:34 PM posted to rec.autos.tech

wrote in news:4bbdc397-27d1-441d-b948-
:

> On Wednesday, January 1, 1997 at 2:00:00 AM UTC-6, Tim Shih wrote:
>> Does anybody know about a clear glass insulator spark plug?
>> I think i heard about it somewhere.
>> supposedly, the theory is that the "spark" is visible though
>> the glass to determine if all cylinders are firing.
>>
>> how come no one knows what i'm talking about?
>>
>> thanks
>> tim
>
> don't listen to those armchair experts.
>
> here ya go.
>
> http://www.autoexpertproducts.com/colortune-12mm.shtml
>

holey crap, that was 1997, pretty sure he isnt checking back any more. KB

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