Plug reading

[Bruce Plecan]

> I for one would be grateful if you could expand on the identification of
> detonation from plug-reads..

It's really kinda a no-brainer once you see it, it's just little macroscopic
balls attaced to the porcelain.

> Mild/occasional detonation is something I'm keen to be able to identify
> (assuming I can't actually hear it)

Tip in Ping *can* be non audible.
The only way to find out it exists is thru plug cuts.

 - will mild detonation show up as flecks
> as you describe, or does it need to be more severe or long-term to
actually
> show?

The balls are a constant per engine design / specs.
The the more severe, the quicker they accumulate.
May take several episodes for enough to accumulate that you see them.
Grumpy
>
> Your thoughts appreciated
>
> Rich
>
> > -----Original Message-----
> > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > Behalf Of Bruce Plecan
> > Sent: 04 August 2000 19:29
> > To: diy_efi at diy-efi.org
> > Subject: Re: WPSLPGExhaust Gas Oxygen (EGO) sensor Information
>
> >Snip
>
> >  as well as
> > > watch for salt and pepper flecks on the porcelain insulator.
> >
> > Detonation.  Those flecks are parts of the piston dome leaving the
engine.
>
> >Snip
>
> > Grumpy
>
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