What Are the Signs of Coil Damage, and How Can I Identify Them?

In all engines, each spark plug connects to a single cylinder, with the spark plug located next to the injectors that pump a specific amount of fuel into the combustion chamber (cylinder) to facilitate a proper combustion process. Alongside each spark plug, an essential part called the car’s coil is found, with each coil connected to one spark plug.

Car coils play a vital role in engine operation and directly affect the car’s torque and power. Therefore, it is crucial to ensure their integrity and perform periodic maintenance on them.

Primary Functions of Coils

Car coils work to increase the amount of electrical voltage produced by the battery and convert it into the spark plugs (ignition coils) to provide them with sufficient power to generate the necessary spark for a proper combustion process. It is a highly precise process that takes only a limited number of seconds.

A constant level of resistance in this process must be maintained. If resistance levels differ, the spark may weaken, making it impossible to start the car or causing it to stall while driving.

Signs of Coil Damage in the Car

  • Increased engine temperature
  • Hesitation or sputtering during driving, weakening its power and reducing torque
  • Engine shaking during startup, with increased shaking when pressing the gas pedal
  • Increased fuel consumption
  • Car stalling while driving
  • Difficulty starting the engine
  • Noticing a malfunction in the operation of the spark plugs
  • Illumination of the engine light on the dashboard
  • Gasoline leakage or black smoke from the exhaust pipe

Causes of Coil Failure

  • Intensive use of the engine and prolonged high temperatures due to low oil levels or clogged engine filters
  • End of the expected lifespan of the coils and their wear, generating larger amounts of electricity and lowering their resistance
  • Use of low-quality spark plugs
  • Electrical short circuit and malfunction in the car’s wires and electrical system
  • Water or oil leakage into the coil wires
  • Increased coil temperature

How to Maintain Car Coils

  • Regularly clean them from deposits and inspect the coil cover for signs of oil or gasoline leakage.
  • Replace coils after covering a distance of 100,000 km, with some coils possibly operating up to a maximum of 150,000 km.
  • Conduct regular inspections.
  • Seek help from a specialist when detecting any of the above-mentioned symptoms of car coil damage.

In conclusion, we have discussed in detail the signs of weak coils, the reasons for their failure, when to replace them, and the essential tips to follow to extend their expected lifespan.

Finally, you can read the latest car news. You can browse the car reviews section on Motorcoaster to learn about the latest developments in the exciting automotive world, and you can view the best car tips & advice for maintaining your car to make it last longer.

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