Resistance Inspection

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. 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 Fig 1.
- If not within the specification, replace the spark plug.
  Resistance
  
  3.0-7.5 kilohms [20 °C {68°F}]
Fig 1: Measuring Resistance Of Spark Plug Using A Tester
Courtesy of MAZDA MOTORS CORP.