Reading spark plugs

[DK]

A simple read and explanation of what spark plug's should look like ........

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

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

http://www.ngksparkplugs.com/techinfo/spark_plugs/techtips.asp

[DK]

Another one .....

http://en.wikipedia.org/wiki/Spark_plug