All Bosch ignition coils are built to achieve or exceed OE specifications and are known industry-wide for their reliability and performance. Bosch ignition coils convert low voltage into high ignition system voltage, creating an electric spark sent to the spark plugs, which ignites the fuel.

• What are some common problems that prevent spark plug wires from working properly?

  A bad ignition coil may be indicated by:

  • Cracks or damaged sealing lips between the connector/plug
  • Corroded connectors
  • Parting area breakdown on the plug insulator (evidence of burning/ scorching on the insulator between the plug connector and plug hexagon) 
  • Porous, cracked, or scorched ignition cables
  • Pressed outcast mass

• What are some of the trouble signs of a bad ignition coil?

  The following symptoms could indicate a bad ignition coil:

  • Poor radio reception
  • Engine misfiring
  • Increased fuel consumption
  • Increased loading on other ignition system components
  • Poor starting behavior, especially under cold/humid weather
  • Deterioration of emission levels
  • Interference of the engine electronics
  • Damage of the catalyzer (unburned fuel will be burned inside the catalyzer)

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