C-10Chance

Reading Plugs....

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alrighty now, so i posted up a thing in a diff. forum about my tranny blowing up. Well i had sprayed the truck for the first time 2 weeks ago, and it held up well.

I just checked the plugs today. Not sure how to read them.
Tried to get some good pics, but my camera sucks...

SILVERADO11

Normal
Light brown, tan or grey firing end. A good indicator that the plug is functioning correctly and general engine conditions are good.

Dry and wet fouling
Fouling, either dry (top - matt black, sooty) or wet (bottom - gloss black, sticky),
Can be caused by many different conditions. Carbon deposits build up when the plug fails to fire correctly and burn them off. Air/fuel mixture too rich, choke stuck on, electrical problem, extended periods of low speed driving, plug heat range too cold. All should be investigated


Overheating
When overheating occurs, deposits which have accumulated on the insulator tip may melt and give the tip a glazed appearance Possible causes are overadvanced ignition timing, air/fuel mixture too lean, water or oil level too low, plugs not fitted (tightened) correctly, plug heat range too hot.



Yours look normal to me.

C-10Chance

so it looks pretty good?

i sprayed it and everyone says read the plugs after.

SILVERADO11

looks good to me man.

00ChevyScott

iTrader: (10)

I agree. What heat range are the plugs? (a model # would help)

Wheatley

iTrader: (12)

Kind of hard to tell in those pics without seeing the base of the porcelain,also hard to see the ground strap clearly in those pics.The ground strap is what tells you if the plug is to cold or hot.
Read this and you will get a much better understanding on how to properly read your spark plugs.
IMo,this is very important
http://www.dragstuff.com/techarticle...ark-plugs.html

C-10Chance

yeah, im gonna get some better pics though.
shall i take all 8 out, because number 6 is a pain with the header on.

or only 1??

Wheatley

iTrader: (12)

When I check plugs which is often,I always check all 8.Just because 1 2 or 3 plugs look good does not mean all 8 are fine.Always check all 8 IMO

SILVERADO11

i would pull all 8 plugs, that way you can read each one and make sure they all read the same and are good.