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Home >> Mitsubishi >> 2015 >> Lancer Evolution MR >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - Lancer Evolution >> On-Vehicle Service >> Spark Plug Test

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.
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