They serve to convert the battery’s low voltage into the high voltage necessary to fire the spark plugs. If there’s any malfunction in the ignition coil, the car won’t start or run properly.

The ignition (or distributor) cap is where ignition wires that run to the spark plugs receive high-voltage current from the ignition coil. Metal contacts in the cap connect with contacts in the ...

Unlike most Tesla coils, [Teodor]’s design is able to run with a fairly low input voltage because it doesn’t use a static spark gap like most Tesla coils. Instead, his coil uses a relay in ...

In this video, I show you how to test spark plugs and coils on any car, even if the spark plugs are recessed or hard to reach. Whether you're troubleshooting engine misfires, poor performance ...

Car exhaust flame throwers work by interrupting the spark to the engine. This dumps raw fuel into the exhaust system. The fuel is ignited by a coil and spark plug placed right before the exhaust tip.

The typical automotive spark plug is about the size of your ... see — connects to either a spark-plug wire or an ignition coil (sometimes called “coil-on-plug”). The bottom of the spark ...