Ignition Cap and Rotor

Ignition Cap and Rotor

An ignition cap and rotor work in tandem to deliver the spark generated by the ignition coil to the spark plugs. 

Signs of a bad ignition cap or rotor

  • Your check engine light is on
  • Inability to start the engine
  • Abnormal engine operation
  • Rough idling
  • Poor performance

Ignition cap and rotor maintenance and repairs

  • Driving a vehicle with a malfunctioning ignition cap or rotor may affect your catalytic converter.
  • Follow the manufacturer’s recommended rotor and cap change intervals, which are about 30000 miles.
  • Problems with the ignition cap or rotor can be signs of other ignition parts’ failures, for example, ignition wires. You should check the whole system to make sure there is no other issue.
  • Different fluid leaks may break the rotor and cap down if they are not fixed.
  • Both cap and rotor should be replaced as a set.
  • Be careful when working on the ignition system when the engine is running. Its voltage can reach up to 45000 volts.