2024 Kia Seltos X-LineFACTORY OEM SERVICE PROCEDURE

Spark Plug: Troubleshooting

  1. Check the DTC code with the KDS (Refer to DTC INDEX ).
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  2. Check the ignition coil connectors (A).
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  3. Check the installation condition of the ignition coils (A).

    Tightening torque:Β 

    9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb.ft)

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  4. Remove the spark plug.

    (Refer to Spark Plug - "REMOVAL AND INSTALLATIONΒ ")

  5. Visually inspect the external spark plugs.

    Spark plug gap [mm (in.)]:Β  0.7 - 0.8 mm (0.0276 - 0.0315)

    Symptom Suspected Cause Correction
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    Melting electrode    		 Abnormal combustion, overheat Replace the spark plug
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    Carbon and foreign matter
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    Ring crack    		 Abnormal combustion, external Shock
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    Vertical crack    		 External shock
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    Overheat    		 Abnormal combustion
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    Poor gap    		 Physical damage Replace the spark plug
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    Flash over    		 Excessive electrode wear Replace the spark plug, ignition coil
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    Corrosion/Rust    		 Remaining oil mist Reassemble the spark plug
  6. Check the resistance between the spark plugs terminal (A) and probe (B) by using a multi-tester or a resistance meter.

    Specified value:Β  2 - 20 KΞ©

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    NOTE:
    • Avoid the contact resistance between probe and spark plugs (when it occurs, the measured value is not stabilized).
    • Be careful not to damage center electrode (A) while measuring resistance.
    G16423455Courtesy of KIA MOTORS AMERICA, INC.
  7. Test for changing position of each ignition coil and spark plug.
    1. Remove the spark plug (A) and ignition coil (B) from the misfiring cylinder and exchange them with one of the other cylinders.

      (Refer to Spark Plug - "REMOVAL AND INSTALLATIONΒ ")

      G16423456Courtesy of KIA MOTORS AMERICA, INC.
    2. Replace the spark plugs, if misfire moves along the spark plugs.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.