Kia Forte: Spark Plug Cleaning

The combustion temporarily becomes unstable, due to the aged fuel and the carbon deposits accumulated on the spark plug(s) after long-term storage.

[1st Method]

1.	Start the engine and keep the engine running at idle for 2 minutes.

2.	Step on the accelerator pedal and hold it steady at 4500 rpm with the shift lever in N position to warm up the engine until the temperature of the engine coolant reaches 80Â°C.

3.	Keep the engine running at 2500~3000 rpm in the N position for 15 minutes.

[2nd Method]

â€¢	The 2nd method should be performed only if the 1st method fails (the misfire-related codes recur).

1.	Start the engine and keep the engine running at idle for 2 minutes.

Drive the vehicle for over 20 minutes, keeping the engine speed above 3500 rpm.

â€¢	If equipped with manual transaxle, shift the gear properly for keeping the engine speed above 3500 rpm.

[On vehicle inspection] 1. Accelerate the engine to about 3,000 rpm 3 times or more. 2. Remove the spark plug. ...

1. Remove the ignition coil. (Refer to Ignition System - "Ignition Coil") 2. Using a spark plug wrench, remove the spark plu ...

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