Immediately after the Civil War, they sought to give meaning to freedom by reuniting families separated under slavery, establishing their own churches and schools, seeking economic autonomy, and demanding equal civil and political rights.
An ignition coil (also called a spark coil) is an induction coil in an automobile 's ignition system which transforms the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel.uch smaller coils are used with one coil for each spark plug or one coil serving two spark plugs (for example two coils in a four-cylinder engine, or three coils in a six-cylinder engine). A large ignition coil puts out about 40 kV, and a small one such as from a lawn mower puts out about 15 kV.
For vehicles with a coil on plug ignition system, a bad ignition coil would cause a misfire in one or more cylinders at once. The engine will still run, albeit quite powerless, and rough. Some coil on plug ignition coils actually control two cylinders with a waste spark system (as described above). In that type of system some bizarre failures can take place. A single waste-spark coil may cause just one cylinder to misfire, and other times it may cause both cylinders that it controls to misfire.