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Ignition Coil

Ignition Coils from Delphi, Bosch, Denso, BWD, and Spectra

Ignition Coil

What is an Ignition Coil?

A vehicle’s ignition coils are responsible for providing the spark plugs with enough electric power to create a spark. This power is often transferred through spark plug wires, however many modern vehicles are now using coil-on-plug ignition, eliminating the need for the wires. Refer to your owner’s manual for vehicle specifications.

Because the ignition coil powers the spark plug, having a bad ignition coil could mean that a vehicle’s engine has cylinders that are not firing, causing it to lose power, misfire, sputter, and generally run poorly. This can greatly affect a vehicle’s fuel efficiency and performance.

Signs and Symptoms of a Bad or Faulty Ignition Coil

  • Higher than normal fuel consumption
  • Lack of power when accelerating
  • Engine idles roughly or struggles to start
  • Engine sputters or misfires while accelerating

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