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When Should You Replace Ignition Coils?

When Should You Replace Ignition Coils

Most automobiles possess internal combustion engines, which require 3 key essential portions to run, namely_ air, fuel, and electricity. Ignition coils magnify voltage from your vehicle charging system via supply power to the spark plugs.

Need to replace your ignition coil? In this blog, we run through the regular ignition coil, possible symptoms, solutions, and when you should change the ignition coil. Thus, you can be sure your vehicle is working correctly.

How Long Does An Ignition Coil Last?

Usually, the ignition coil lasts for a minimum of 100,000 miles. Gas mileage will be reduced if the coil becomes worn out and unable to transfer power. Car demand more fuel to go, hence you’ll waste more money on gas than average. An ignition coil’s number and type rely on the car’s engine, model, and year. New spark plugs will support ignition coils to last longer.

Types of Ignition Coil

  • Conventional ignition coil
  • Electronic ignition coil
  • Distributor-less ignition coil (DIS)
  • Coil-on-plug ignition coil (COP)

Signs That It’s Time To Replace Your Ignition Coil

Dealing with a faulty ignition coil may experience any of the following problems

  • Rough idling, engine jerking
  • Engine misfires
  • Poor fuel economy
  • Fuel leaks
  • Difficulty starting the engine
  • Check engine light on
  • Exhaust backfiring
  • Increased hydrocarbon flows
  • Reduce in-car power, particularly in acceleration
  • Exhaust fumes smell of gas

Can You Replace The Ignition Part By Yourself?

Is the car getting harder or delaying to start in the mornings? You may need to change one or more of its ignition parts. Some repairs can be done by you depending on the part, your knowledge, and experience as well.

Some replacements are easygoing, even though others are tricky too. If you don’t have proper expertise in this field or are not comfortable replacing coil yourself, so it’s time to leave the job to an expert mechanical hand.

Finally, the Top Failure Reasons of Coil

  • Voltage overload
  • Bad plug wires
  • Bad spark plugs

Safety Precautions When Working With Ignition Systems

Naturally, an ignition coil generates an extremely high voltage that is harmful to your health. Follow the safety precaution whenever working with ignition:

  • Always wear OSHA-approved safety glasses.
  • Keep your hands away from the spark plug wires.
  • Use the right tools when working on computerized and electronic systems.
  • When changing the coil, make sure the ignition system is off.
  • Ensure the engine has cooled down before removing spark plugs and wires.
  • Verify that the circuit has been disconnected and the system is off- when using a volt/ohmmeter to check resistances.
  • Follow the manufacturer’s recommended diagnosis and service procedure while checking any ignition system.


During idling or low speed, the car may perhaps feel like it is shaking or that power is lost randomly, but often. This can occur when coils provide irregular electrical currents to plugs.

If your vehicle has become hard to start, replacing the ignition coil can be a simple solution for your big problem.

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