Re: Plug appearances

[John Graham <jgraham1@erols.com>]

AudiJeep@aol.com wrote:

> Put a new set of Bosch tri-electrode plugs into my '92 100S this
> evening. The
> old NGK's had approximately 20k on them. They looked in exceptionally
> bad
> condition. The electrodes looked badly corroded or caked with a
> whitish
> substance.

That from the heat . I get that on all 5 plugs in my coupe.

> A couple of them also had the appearance of having an oily
> subatance on the electrodes.

It may be a cloged fuel injectors.

> On the outside of two of the plugs, there
> appeared to be some charring of some kind.

Check the plug wires for dirt. There may be some arc over.

> I've changed plugs before in my
> old Maxima, and never seen any of this before. Any explanations for
> these
> occurrences? TIA.
>
> Craig
> '92 100S (66k)

 John
1990 CQ