Ignition coil – what is it and why does a car need it?

The ignition coil is one of the small but very important parts of a car engine.
Its job is to convert the weak voltage from the battery into a very strong electric spark , which ignites the fuel in the cylinder. Without an ignition coil, a car simply won't start .

simply put:
The ignition coil turns a weak current into a strong spark “bump” that starts the engine.

How does the ignition coil work?

1. A car battery provides low voltage current.

2. the ignition coil increases this to thousands of volts .

3. This strong voltage is sent to the spark plug .

4. the candle makes sparks and the cylinder works.

Every gasoline engine has both an ignition coil and spark plugs - they work together.

What are the types of ignition coils?

cars have different solutions:

• one large ignition coil for all cylinders (older cars).

• Coil block – one part for multiple cylinders.

• coil-on-plug – each spark plug has its own ignition coil (most modern cars).

The newer the system, the better the startup and cleaner the operation.

signs that the ignition coil is faulty

If the ignition coil is not working properly, the car will clearly indicate this:

• the car shakes or runs unevenly,

• the check engine light is on,

• the car does not accelerate well,

• fuel consumption increases,

• starting is difficult, especially in the cold.

A faulty ignition coil can also damage the spark plug and even the catalytic converter if ignored for a long time.

Why does the ignition coil go out?

most common reasons:

• age and heat,

• oil leaks in the spark plug cavities,

• humidity and condensation,

• faulty spark plugs (make the coils work harder).

How to extend the life of an ignition coil?

• change spark plugs on time,

• keep the engine dry and clean,

• do not let oil leaks into the spark plug cavities,

• use quality spare parts.

Can the ignition coil be repaired?

Modern ignition coils are usually not repaired .
If a side is broken, a new one is usually installed.
Fortunately, this job is easy and on most models, the replacement only takes a few minutes.

short summary

• The ignition coil converts the weak current from the car battery into a strong spark.

• Without an ignition coil, the engine will not start.

• Most faults: shaking, power loss, check engine.

• A faulty ignition coil should be replaced quickly to avoid more expensive damage.

• Regular maintenance (especially spark plugs) will extend the life of the ignition coil.

Buy an ignition coil for your car here!