Q: what does the coil actually do? or used for?

asked by on

just wondering what the coil does & what it does & when do you know it needs replacing?

Hi there. Ignition coils transform low voltage electrical power 12 volts D.C. to high voltage current 50,000 volts D.C. or higher. The spark generated by the ignition coil ignites the fuel and air mixture in the engine that enables the car to start and run smoothly. If an ignition coil is not working properly, no spark will ignite the air fuel mixture, causing a misfire. A bad ignition coil can severely damage the engine or catalytic converter. When the ignition coil is damaged, it is unable to create this high voltage spark, and your engine will have a hard time running, or may not run at all. It’s at this time that you know that the ignition coil needs to be replaced.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. what does the coil actually do? or used for?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car died. I'm worried I'll have to replace my engine.

Hi Emily. Thanks for contacting us tonight. If the engine stopped running and there is a lot of oil sprayed under the hood, then it's likely that you've experienced a rather significant oil line or mechanical component failure. When the...

Q: only passenger side plug is carbon build up driver side is clean change plug doing same thing

Hello, thank you for writing in. The most common cause of carbon build up on the spark plugs is unburned fuel, also known as "running rich". Despite the assumption that the injectors are to blame, it usually has more to...

Q: Cutting out won't start

Hello. If you're getting proper fuel, and the alternator and starter are working as they should, I would check for loose wiring related to the alternator and battery and I will also test the battery to make sure that it is...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...