Spark plugs play a key role in keeping your engine running, since it's that little jolt of electricity that ignites the fuel/air mixture in a motor's cylinders. And that little spark has to be ...

QUESTION: I was wondering if you could talk me through changing my spark plugs. I've learned to change my own oil and filter, and figured why not? It's a 1999 Honda Civic, so it's pretty easy to work ...