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-   -   Burnt Plugs? (http://www.mazdaspeedforum.org/forum/forum/f505/burnt-plugs-223277/)

Gary1001 12-30-2019 06:34 AM

Burnt Plugs?
 
1 Attachment(s)
All the plugs have a caramel ring at the base of the porcelain. is this normal?

Pulled them at 15k miles to do a compression test (which was 170 across all cylinders). NKG 3787 gaped to .28.

The only mod I have is a stage 1 98 tune (OTS Cobb).

cardoc4u 01-05-2020 02:21 PM

It is not uncommon to see that, and does not mean the plug is "cooked". I recommend setting the gap to .026" .

CHEERS!


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