The Spark Plug is a device that is a part of a car's ignition system. Its main function is to cause the electric current from the ignition system to generate a spark strong enough to burn the fuel mixture in the combustion chamber. The spark plug has a central electrode that is insulated from the outer metal shell by a ceramic insulator. The ceramic ensures that the spark is generated only at the gap and not anywhere else on the electrode. The central electrode is connected to the output terminal of the ignition coil by a heavy insulated wire.
The high voltage, nearly 12,000 - 25,000V, coming in from the ignition system causes a voltage difference between the central electrode and the side electrode. The fuel and air mixture initially act as an insulator but as the voltage builds up, the gases become ionized. This causes a surge of electricity to flow across the gap, increasing the temperature in the spark gap. This high temperature causes the ionized gas to expand very rapidly, causing a spark across the gap.
If your engine emits a jittery, uneven sound when it is idling, fails to start or experiences surges while running, it could be sign of a faulty spark plug. If your spark plug is defective, you should replace it as soon as possible to prevent any serious damage to your engine. At Buy Auto Parts we stock a wide variety of spark plugs for every car make and model.
We have genuine OEM replacements and premium aftermarket parts. All our car parts are thoroughly tested and come with a warranty. To view the parts that fit your vehicle, select the right year, make and model of your car on our online catalog. At Buy Auto Parts you will find high-quality spark plugs at unbeatable prices, and free shipping. If you have any questions about our car parts, call our toll-free support line 1-888-907-7225 or email us at [email protected].