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Spark Plug Test

WARNING: This page is about a different car, the 2009 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the spark plug and connect to the ignition coil.
    Fig 1: Identifying Spark Plug
    G05375451Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. Ground the spark plug outer electrode (body), and crank the engine.

    Check that there is an electrical discharge between the electrodes at this time.

    Fig 2: Identifying Electrical Discharge Between Electrodes
    G05903698Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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