Spark plugs sit at the center of every gasoline engine’s heartbeat, turning fuel and air into the controlled explosions that move your car. When they work properly, you feel smooth power, quick starts ...

Misfiring, rough idling, poor acceleration, and decreased fuel efficiency -- the four ominous horsemen of bad spark plugs. Nobody wants to ever get to that point before desperately changing such a ...

Like rotating tires or changing oil, replacing spark plugs is a job that can be easily, and inexpensively, done in the confines of your own home. Although they don’t need maintenance as often as the ...