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Home >> Mitsubishi >> 2005 >> Galant ES >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Ignition System >> On-Vehicle Service >> Spark Plug Test

Spark Plug Test

  1. Remove the spark plug and connect to the ignition coil.
    Fig 1: Removing Spark Plug And Connect To Ignition Coil
    G02393908Courtesy 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 Spark Plug Defective Insulation
    G02393909Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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