All spark plugs may look the same to the untrained eye. Unfortunately, nothing could be further from the truth. For starters, spark plugs come in many types that are mainly differentiated by the ...

Before you undertake any of this work, make absolutely sure that you won't damage your car by attempting to fix the spark-plugs. Follow these steps to remove each spark plug: 1. Gently grasp a spark ...

For hot rodders, spark plugs are often nothing more than inspection tools that reveal whether an engine is running too rich, too lean, or just right. Street guys look for a nice tannish-brown tint on ...