What is an Ignition Coil


Ignition coils allow the engine to produce sparks in order to let the gas inside the combustion chamber ignite. An ignition coil electronic gadget that transforms the voltage of a battery into sparks using electromagnetism and induction.

How Ignition Coil Works?

In most cars, there is one ignition coil for each spark plug, which means you will typically have four coils total. Every time the engine turns over the ignition coil transmits an electronic signal for each plug. The coils are generally placed on the top of the engine, alongside the plugs. They are responsible for the ignition of the vehicle’s air and fuel mixture to allow the engine to continue to operate.

If all electrical components work in a proper manner When everything is working properly, the spark plugs light the combustion chamber with fuel and then transmits energy to the pistons of the engine. The process is repeated every time the engine is turned over.

The most common ignition coil consists of a main and secondary winding within the metal casing. The primary winding is able to receive very low power from the electrical system of the vehicle and functions as an electrical transformer. When the primary winding of the coil gets powered up, it causes an alternating current to the secondary winding of the coil. This causes a huge voltage to rise on the second winding. The energy build-up is so large that the case of the coil should be grounded so that it won’t short circuit, causing sparks to fly across the second winding to the ground, which could cause damage to the coil as well as other vehicles components.

If you need to release electricity and energy, the voltage in the secondary winding surges through the air gap in the spark plug. The electrical energy ionizes the air surrounding it, dissolving its resistance, and an arc is formed between the end of the plug’s spark and its electrode. The spark is ignited by the fuel in the combustion chamber. It then provides power to the pistons of the engine.

The piston’s pressure will cause air to compress inside the intake manifold of a vehicle. This process continues each time the engine turns over.


Most ignition devices employ one coil for each plug. The most commonly used manufacturers include:


*AC Delco (GM)

*Motorcraft (Ford)

*Delphi Packard

Is the Ignition Coil the Same as the Spark Plug?

The ignition coil is usually not identical to the spark plug. Spark plugs are the part in your car that releases sparks. It is, however, directly connected with an ignition coil. Its primary function is to aid in the start-up of the ignition coil whenever it is struck by a spark. When this occurs, a new task to the spark plug is that make sure that spark knocks don’t repeat themselves by putting a spark into the ignition coil whenever it is required.

In order to perform their job, spark plugs require three elements: energy generated by the spark as well as oxygen from the air inside engines, as well as the fuel that comes from the vehicle. Without these three components, spark plugs will not perform their job. Spark plugs get rid of the spark knock issue by transmitting sparks into the coil that is directly connected to it. If a spark knock happens, it can cause an engine problem in the event that it is not corrected. This is due to the fact that spark knock can actually hinder the performance of the engine because it makes it work more than it needs to for its job.

Spark plugs are comprised of either metal or ceramic. The spark plug is made of the metal tip on the bottom and is close to an ignition coil’s top. The spark plug transmits an electrical spark to the ignition coil as well as is utilized to create a magnetic force inside the engine of the car.

To ensure that cars perform, spark plugs must send sparks into the coil that ignites, and spark knock must be eliminated. It can impact how an automobile performs in the event that spark knock isn’t removed. Spark plugs as well as the spark coils they are connected to are essential for automobiles, however, spark plugs usually aren’t ignition coils.

Ending Words

Although it’s not mandatory to change your ignition coils at regular intervals, it’s an excellent idea to test them at least every oil change or every so. A lot of experts suggest inspecting your car’s ignition coil each when you change the spark plugs. You may also buy an instrument for diagnostics that can help detect electrical issues in the car, and notify the driver of repairs required. (by Easybom)