Definition:
By the wiki, a spark plug is an electrical device used in an internal combustion engine to produce a spark which ignites the air-fuel mixture in the combustion chamber.
Read and know Your spark plug's condition:
If your spark plugs are fouled or damaged, it can lead to a host of problems including reduced gas mileage, slow acceleration, engine misfires and trouble starting the engine. If you are experiencing engine problems, taking a look at your spark plugs is a good place to start. When reading spark plugs, you will likely find one of the following conditions:
- Normal spark plug A normal spark plug will have brown or grayish-tan deposits on the side electrode. Everything is just fine with your spark plug; you can reinstall the spark plug
Carbon fouled Black, dry soot on the electrodes and insulator tip indicates a carbon-fouled plug. This can be caused by a dirty air filter, excessive driving at low speeds, too rich of a fuel/air mixture or idling your vehicle for too long
- Oil/Wet Engine flooding or oil leaking may cause that.And it is better to replace the spark plug after problem addresssed.
- Burned Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot. Causes can include the engine overheating, incorrect spark plug heat range, a loose spark plug, incorrect ignition timing or too lean of an air/fuel mixture. The spark plug should be replaced.
Worn / Broken electrodes Worn and eroded electrodes are symptoms of a spark plug that is past its prime. The plug has been in the engine too long and needs to be replaced.
Change a Spark Plug
- 1.Before change the spark plug, please make sure the enhine is cold and disconnect the battery.
- 2.Remove spark plug wires or coil-on plug connectors
- 3.Remove spark plug with socket
- 4.Examine the spark plug and install the new one
- 5.Reattach wires / coil-on-plug connectors and battery
