altec wrote:http://www.classic-car-magazine.co.uk/articles/spark_plug_colour_guide_chart.html
fouled plug diagnosis
before the fuel injection cleaning..the plugs fowled within a day...after the injector cleaning i changed the plug after about a month of running the car and then i replaced the plugs...before the cleaning the plugs had excess carbon deposited on the plugs ...i did the cleaning and now i am looking at the plugs i pulled out...only at the base of the plug is blackish(carbon) but the tip (when i wipe it on a tissue) is clean..no carbon...does that mean the injectors are good now?