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Spark Plug Test

WARNING: This page is about a different car, the 2005 Mitsubishi Endeavor. 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: Removing Spark Plug
    G02390313Courtesy 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
    G02390314Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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