Resistance Inspection

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Measure the resistance of the spark plug using a tester as shown in the figure.
- If not within the specification, replace the spark plug.
  Resistance
  
  3.0-7.5 kilohms [25°C {77 °F}]
Fig 1: Measuring Spark Plug Resistance
Courtesy of MAZDA MOTORS CORP.