The Family Handyman on MSN

How To Test an Ignition Coil

Test the ignition coil quickly and easily with a simple ignition system tester ...
A windings road:It all starts with the concepts of inductance and electromagnetism. Inside an ignition coil there are two sets of wire windings (aka coils, that's why it's called a "coil," get it?).
Igniting the fuel supplied to your cylinders creates power. It sounds simple enough, but is not always the case. Although most stock ignition systems do their basic job sending spark to ignite the ...