Reading spark plugs is becoming a bit of a lost art.

Like much in life, the difference between detonation and pre-ignition, and their effects, comes down to timing. Both refer to a situation when an engine's fuel/air mixture combusts at the wrong time, ...

Add Yahoo as a preferred source to see more of our stories on Google. The color of a spark plug can tell you a few different things about your engine's health. In extreme cases, a blackened spark plug ...