Spark plugs are typically the firestarters of an internal combustion gas engine. And when a spark plug goes wrong, it could potentially mean a host of problems like engine knocking, misfires, power ...

Q I recently took my '02 Chrysler minivan in for 100,000-mile service and was told that one of the spark plugs would not come out of the cylinder head. The shop tried, but it would only come out so ...