[Diy_efi] Spark Plug readings

[Brian Renegar]

Maybe you are seeing effects from the camera flash.  I think there is also 
some anti-seeze on the electrode.  Probably got on there when I removed the 
plugs, since the threads have it on them.  It wiped right off, and the 
electrode looks pretty clean and smooth underneath.  No piston chunks on 
it.  :)  The plugs also smelled a little like gas when I removed 
them.  That, plus the fact that I have a rich tune, makes it hard for me to 
believe that it's running lean.

Did not see the exhaust.  Too busy watching the road!  I need a passenger 
to monitor all these things while I hammer it!  lol

Brian

P.S.  When I put the motor together, I calculated 8.7:1 compression 
ratio.  Stock for this motor is 9:1.


>That was actually jpg 5 that looks like it has some
>molten aluminum on it. The elctrodes are clean an
>whitish. seems like lean to me. The carbon stuff looks
>more like oil deposits to me. If the mixture was right
>they wpouldn't look all spit-polished and whitish like
>that I wouldn't think. The electrodes would be more
>brownish, and if it were rich it be blacker.
>What you're explaining sounds like a rich contition (
>ie miss and unburnt fuel igniting in manifold) but
>those plugs don't look that way. You didn't hapeen to
>get a look at your actual exhaust leaving the car did
>you? If it were that right you'd probably have some
>nice black smoke clouds happeneing.
>
>
>-Kenny


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