photos of my plugs after a burn

[bugsiegel]

Would you consider these lean? photo is of the same plug but I did pull one from each bank and they looked the same.
I jumped on the highway ran it up and cut the ignition.
Here's what I got. Notice the scratches on the last photo to show I was able to scratch some residue off. Not sure if that means it's not all being burned away.

[Dec211975]

It looks like it is burning normal how many miles on the plugs? Here is a link to a chart
http://www.google.com/imgres?imgurl=...sQ9QEwAQ&dur=1

[ken ct]

Looks like a nice coffee color on the center ceramic.I would say ok. ken ct omo

[Russ/40]

They look great. Not many miles though.

[JWL]

It is impossible to "read" plugs for the purpose of determining air/fuel ratio adequacy if the plugs are "used" plugs. Readings can only be taken on a new set of plugs.

[chuck stevens]

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If it was lean it would be chalk white, a chocolate milk light brown is good.

[bugsiegel]

New plugs are on the way. When they arrive I will install and repeat the test.
Thanks all.

[G.M.]

To me they are almost perfect. I go by the black showing on the flat surface looking at you. It don't sound like you ran it far. I would drive at least 20 miles before checking. Just the two front plugs will give you a reading of both main jets. I have adjustable jets so I can tune it exactly to what I want. I like that surface cleaner with black spots. As long as the black don't build to a thicker carbon deposit what you have is very slighty rich. G.M.

[ford1]

new plugs wont tell you much, plugs that have been run are a true indication of the condition in the combustion chamber, they look xlnt to me, half of the guys on here wished theres were looking that good

[Mart]

I'd call em good.

Mart.

[Karl Wolf]

If the gas mileage is decent, and they're that color... I like it...
Karl

[Ol' Ron]

These plugs look very rich comparied to the ones from our test engine which is getting 21 mpg in adverage driving. I'll try and post pics.

[bugsiegel]

Here are the same plugs before I increased the jet sizes.
I don't think I did an actual burn and cut before I took these photos.

[Ol' Ron]

Looking at plugs, don't really tell the story. Using an A?F meter does. also the seat of your oants will too. also If your ignition and PV are not set right the plug readu=ing can be off. Todays gas is also filled with detergents for the EFI systems not to mention ethnol.

[Bruce Lancaster]

And don't forget the ethanol...10 or 15% of that is leaning mix 3-5%, potentially raising issues there. And anywhere you have alcohol, extra water is sure to come along...

[JWL]

Strictly for the purpose of reducing ignorance on the subject of plug reading it should be made clear that trying to "read" used sparkplugs, to determine present air/fuel ratio conditions, is impossible because of the irrelevant affects of various situations, such as choke starts, oil encroachment, idle settings, etc. etc. which have occurred over the life of the sparkplugs.

As I pointed out in my book, modern gasoline has made plug reading a difficult task. But, getting even a remote idea, with used plugs, about the current conditions inside a combustion chamber might require several hundred miles of operation at the desired test speed, and a clean cutoff, to change a plug color and it might never allow the fuel ring to be visible. But then, the actual "reading" of sparkplugs is a far more technical subject than the average driver is interested in learning about.