An ignition coil (also called a spark coil) is an induction coil in an automobile’s ignition system that 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.
The ignition coil on your car usually lasts around 160,000 kilometers or more. There are a number of factors that can lead to this part becoming damaged prematurely. Due to the all of the copper wire that is inside of an ignition coil, it can be easy for it to become damaged over time due to heat and moisture. Having a coil on your car that is not firing as it should can decrease the overall level of functionality that your engine has. Leaving a damaged ignition coil on a car for long periods of time will usually lead to more damage being done to the wires and plugs because the resistance values will increase causing the coils to break down and not fire up the vehicle to its fullest capacity.
A common symptom of bad ignition coil is backfiring. The backfiring caused by your vehicle can indicate the symptoms of the ignition coil failure in its early stages. Other symptoms are poor Fuel Economy, Engine Misfiring, Vehicle Stalling or Engine Jerking, Rough idling, and Poor Power.