Spark plugs are instrumental in making a gasoline engine run.
They shoot out a spark of electricity into the compressed
mixture of air and gasoline within an engine's cylinders. This
ignites the mixture and forces the cylinder's piston down. The
motion of the piston is what creates power. Spark plugs also
have another job -- they pull heat away from the combustion
chamber. That means spark plugs can get very hot. In general,
cars have a spark plug for every cylinder in the engine. For
instance, a four-cylinder engine will have four spark plugs.
However, there are exceptions to the rule -- a vehicle with a
HEMI engine will have two spark plugs per cylinder. Spark plugs
wear out over time. As they get older, they may not spark
properly. This affects your engine's performance and results in
a loss of power. But replacing your spark plugs isn't like other
car repair projects -- it's much more straightforward and only
requires a few tools. You don't need to be a skilled auto
mechanic to change your car's spark plu