What does a coil igniter do?

How are ignition coils different from spark plugs, and what does a coil igniter do?

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Answer provided by
Kathryn Mae Kurlychek
Answered on Apr 28, 2022
Your car’s coil igniter is responsible for sending voltage to the spark plugs, which spark your engine’s cylinders and turn over your car’s engine. Put simply, it’s what gets your car running.
If your coil igniter is faulty, you may experience problems such as:
  • Starting or driving your car
  • Engine misfires
  • Backfires
  • Reduced fuel economy
  • Stalling
  • Spluttering noises
  • Shaking or vibrating when your car is idling
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