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Faulty ignition coil: how does it affect the car?

The mechanics of the car is quite complex and, no matter how small the part, the failure to function can cause major problems. The faulty ignition coil is an emblematic example of this.

The most common noticeable symptoms are car spending beyond normal, faults or high-pitched noises, and underperforming – this last reason can also be due to adulterated fuel.

As it is a very delicate piece, any crack or light break in the towers, especially at the points that make the connection of the cables, causes current leakage and damages the ignition coil.

This piece has undergone some refinements over the years. One of the main ones was that in the newer models, the coil lost its cylindrical shape, which was almost always orange.

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Recently, the piece has undergone some modifications and currently has different sizes and formats. What it cannot present are flaws and defects.

Understanding when the ignition coil is faulty is important, but more than that, knowing exactly how to protect your car is critical.

For that, nothing better than Geico auto insurance. With it, the vehicle will be protected against various events, such as crashes, robberies, and theft, and will have various assistance, such as 24-hour towing, protection of the windows, and much more.

The subject of defective ignition coils needs to be understood by people, after all, it is a delicate piece, and, no matter how small the defect, the damage caused is great.

Understanding what the coil is, what its function is, the main symptoms, etc. is super important and guarantees the safety of the car and the tranquility of the driver.

What is and what is the function of the ignition coil?

The function of the ignition coil is to transform the battery voltage into the high voltage required for spark formation. By creating this voltage, it is transferred to the spark plugs, where the sparks are produced that carry out the combustion and, consequently, the operation of the engine.

This part, even if fundamental, can generate some doubts as to its functioning. But, as you can read above, it’s a pretty simple system.

In more detail, it works as follows: it explodes the fuel and air mixture, pushing the piston down and moving the car.

As you can see, the faulty ignition coil can be more serious than imagined, after all, it is a fundamental part of the car’s operation.

It is important to remember that spark plugs work in extreme conditions, so be aware of when to change them.

When to change the ignition coil?

The ignition coil is not a part that usually breaks down easily. The original item can last more than 200 thousand kilometers. However, like any other car part, it also needs preventive maintenance.

The useful life of the ignition coil can be reduced due to the bad conditions of use of the vehicle and the lack of revisions in the spark plugs, suppressor cables, and alternator.

During this preventive maintenance, it is recommended that the spark plugs be changed every 20,000 kilometers. In addition, an analysis of spark plug wires and injector nozzles is recommended. This helps to extend the life of the part, even if it is large.

Faulty ignition coil: main symptoms

Attention, the defective ignition coil is not something simple and the problem needs to be solved as soon as possible.

Practically all cars have an ignition coil, the part responsible for distributing the current to the four candles. However, when the current arrives irregularly at the candles, you must pay attention, as this is a great sign that the candle is defective.

This situation will certainly lead to serious problems in the combustion of the car. Some of the most common symptoms can be easily identified, starting with the shots in the exhaust, when the vehicle is counterbalancing.

This problem occurs when unused fuel is emitted through the exhaust system and is easily identified by the presence of black smoke coming out of the exhaust and the strong smell of gasoline.

Another symptom of ignition coil defects is failure to start the car, especially when the vehicle is cold in the morning. This defect happens between the distributor and the spark plugs. The engine starts to misfire because of one or more spark plugs not receiving the required amount of charge. Therefore, the car does not start at first.

Engine stalled? Another symptom is that the coils may be faulty. If the vehicle starts to stutter regularly when starting or at high speeds, it is a very strong indication that you need to take the car in for a service. In addition, it can also vibrate when it is in neutral or simply stopped at the headlight.

What to check besides the faulty ignition coil?

In case you need to pull your car over to the mechanic to change the ignition coils, remember to check other items, such as:

  • high alternator voltage;
  • inefficient mass potential;
  • worn spark plugs;
  • suppressor cables;
  • connections with zinabre;
  • ignition module;
  • short circuit in the coil windings;
  • cracks in the part.

All this is essential so that the vehicle does not have problems again in a short time after maintenance.

How much does it cost to change the ignition coil?

The price to change the coil varies greatly depending on the type of vehicle and the brand of coil used. On the other hand, the cost of labor has little variation, since, on average, it does not exceed R$40 to R$80. The average price of the part can be, more or less, R$160 for a Renault Logan 1.6, reaching R$420, on average, for a Kia Picanto 1.0.

And then? Do you understand how the ignition coil works? If you still have questions, leave them in the comments, we’ll be happy to help you! And don’t forget to protect your vehicle to avoid headaches!

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