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Home >> Kia >> 2010 >> Forte EX, Automatic >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Ignition System >> Repair Procedures >> On-Vehicle Inspection >> Inspect Spark Plug

Inspect Spark Plug

  1. Disconnect the ignition connectors (A), and then remove the ignition coils.
    Fig 1: Identifying Ignition Connectors
    G06495179Courtesy of KIA MOTORS AMERICA, INC.
  2. Using a spark plug socket, remove the spark plugs.
    CAUTION: Be careful that no contaminants enter through the spark plug holes.
  3. Inspect the electrodes (A) and ceramic insulators (B).
    Fig 2: Identifying Electrode & Ceramic Insulator
    G06495180Courtesy of KIA MOTORS AMERICA, INC.

    Inspection Of Electrodes 

    SPARK PLUG ELECTRODE INSPECTION CHART

    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 

    Unleaded : 1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in.)

    Fig 3: Checking Electrode Gap
    G06495181Courtesy of KIA MOTORS AMERICA, INC.
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