Kia Sorento: Spark Plug Troubleshooting

Troubleshooting

1.	Check the DTC code with the KDS (Refer to "DTC guide").

2.	Check the connection status of the ignition coil connector (A).

3.	Check the installation condition of the ignition coil (A).

4.	Remove the spark plug. (Refer to Spark Plug - "Removal")

Visual inspection of the spark plugs.

Spark plugs point gap [mm(in.)] : 1.0 - 1.1 (0.0393 - 0.0433)

Symptom	Suspected Area	Correction
Melting Electrode	Abnormal Combustion, Over Heat	Replace the Spark Plugs
Carbon and Foreign Matter	Abnormal Combustion, Over Heat
Ring Crack	Abnormal Combustion, External Shock
Vertical Crack	External Shock
Over Heat	Abnormal Combustion

Symptom	Suspected Area	Correction
Poor Gap	Careless	Replace the Spark Plugs
Flash Over	Excessive Electrode Wear	Replace Spark Plugs, Ignition Coil
Stain	Remaining Oil Mist	Reassemble the Spark Plugs

Check the resistance between the spark plugs terminal (A) and probe (B) by using a multi-tester or a resistance meter.

Specification (kΩ) : 2 - 20

Engine Electrical System — Ignition System / Spark Plug / Troubleshooting illustration

•	Avoid the contact resistance between probe and spark plugs.(when it occur, measured value is not stabilized.)

•	Be careful not to damage center electrode (A) while measuring resistance.

Test for changing position of each ignition coil.

1)	Remove the spark plug (A) and ignition coil (B) fitted to the misfired cylinder and exchange them with the one of other cylinders. (Refer to Spark Plug - "Removal")

2)	Replace the spark plugs, if misfire moves along the spark plugs.

Spark Plug Specifications Specification Item Specification Type SILZKR7K11S ...

On Vehicle Inspection 1. Accelerate the engine to about 3,000 rpm 3 times or more. 2. Remove the...

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