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Home >> Kia >> 2007 >> Rio5 Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> On-Vehicle Inspection >> Spark Test >> Inspect Spark Plug
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Inspect Spark Plug

  1. Remove the ignition coil with bolt.
    Fig 1: Identifying Ignition Coil
    G04861917Courtesy of KIA MOTORS AMERICA, INC.
    NOTE: When removing the ignition coil connector, pull the lock pin (A) and push the clip (B).
    Fig 2: Pulling Lock Pin And Push Clip
    G04803991Courtesy of KIA MOTORS AMERICA, INC.
  2. Using a spark plug socket, remove the spark plug.
    CAUTION: Be careful that no contaminates enter through the spark plug holes.
  3. Inspect the electrodes (A) and ceramic insulator (B).
    Fig 3: Identifying Electrodes And Ceramic Insulator
    G04803992Courtesy of KIA MOTORS AMERICA, INC.
    INSPECTION OF ELECTRODES

    Condition Dark deposits White deposits
    Description
    • Fuel mixture too rich
    • Low air intake
    • Fuel mixture too lean
    • Advanced ignition timing
    • Insufficient plug tightening torque
  4. Check the electrode gap (A).

    Standard

    1.0~1.1 mm (0.0394~0.0433 in.)

    Fig 4: Identifying Electrode Gap
    G04861924Courtesy of KIA MOTORS AMERICA, INC.
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