Non-GM knock sensor Q

[Frank F Parker]

> >I'm intrigued by the phrase "or seen in plug cuts"; what does a plug 
> >shown when there's been knocking?
> >
> >
> Looks like little tiny fly turds on the center porcelan.  Just about 
> need a magnifier/jeweler's loupe to see em.  May also look
> kinda like pepper flakes, real fine.  
> Cheers
> Bruce
> 
Bruce,

Is this true for unleaded gas- in other words are the flakes lead
deposits?

regards,
frank