Read this plug please!

http://www.4secondsflat.com/Spark_plug_reading.html

First pic is here (larger): http://www.aa1car.com/library/reading_spark_plugs.jpg

Second pic is here (larger): http://1.bp.blogspot.com/-nW_kLKZ2v...AB4c/Muvx59Hb7KQ/s1600/Spark+Plug+Reading.jpg