Not a major topic and I've posted similar questions before, but still, I want the engine to run properly.
Here's the odd part, this affects only the number two cylinder. The others run clean. This plug has hard carbon on it - not oil - and also an over-all glaze that suggests a too-hot plug. The coating chips off with difficulty in hard flakes.
Is this a reasonable diagnosis (too hot)? Why only the number two plug?
