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Home >> Mitsubishi >> 2015 >> Lancer Evolution Final Edition >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 70 (Ignition System - Lancer Evolution) >> On-Vehicle Service >> Spark Plug Test
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Spark Plug Test

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  1. Remove the spark plug and connect to the ignition coil.
    Fig 1: Removing Spark Plug
    G09641037Courtesy 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 Defective Insulations
    G09641038Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.