http://img194.exs.cx/gal.php?g=dsc000471mf.jpg

The plug on the left is one of my stock plugs that I had left over, and the one on the right is the NGK bpr7IEX, a one step colder plug for 400+ hp cars. I was going to get the car tuned with the plugs, but haven't yet. Malibu jack told me that the colder plugs need to be tuned with the car or they will foul. Is that what happened?

 

reading spark plugs

The website says normal, maybe its the difference between the stockers and your new ones

but its not fouled

 

your either burning water or that cylinder is leaning out..i cant see a big pic of it so i cant tell... all one step colder plug does is just dissapte the heat to the cylinder head a little more.. if you went too cold then it would foul out.. if you went to hot, the plug would overheat causing the electrode to melt...but one heat range will not make a diff...

 

in a regular car the plug on the left is a bit rich but timing is to high. you want a bit of color up to the bend on the ground strap.
the other plug is not to rich but don't get the color. I've had pink plugs from winter gas formulation. Is that your pic or is it off the web?

 

its my pic

 

were the plugs pulled after a hard run, without any idle? (important to determine conditions at time you want to read)
doesn't matter as far as the color though. only thing I can think of, the plug was contaminated with something and you didn't run it long enough to burn it off.

(when I said pink, I meant a slight pink cast, not overspray from a school bus)

 

i've seen plugs look like that from being old and having a lot of miles on them. not fouled or lean either, which is at least a good thing. go back to stock heat range plugs and see then, or swap them around and see if that cylinder does the same thing to the plug. good luck.

 

that is from running oxygenated gasoline

 

https://www.evolutionm.net/forums/sh...d.php?t=115144

 

found these links to compare your plugs



http://www.centuryperformance.com/spark2.asp

http://www.bullittarchive.com/Maint...ng_Spark_Plugs/

http://www.gnttype.org/techarea/engine/plugs.html

http://www.buckeye-illinois.com/sparkplugs.htm

http://www.nightrider.com/biketech/spkplghnbook.htm

http://www.ultralightnews.ca/articl...gsparkplugs.htm

http://www.motorcyclecruiser.com/tech/sparkplugs/

 

trouble is by the time your plug looks as bad as those photos your motor is shot. checking plugs is a matter of small variations on a near perfect plug. a bit of soot, or a a tiny bit of material mated to the porcelin is what you should be looking for.