| VELOSTER(FS) >2013 > G 1.6 T-GDI > Engine Electrical System > Ignition System > Spark Plug>Repair procedures |

Inspection
[On vehicle inspection]
1. | Accelerate the engine to about 3,000 rpm 3 times or more.
2. | Remove the spark plug.
3. | Check the spark plug visually. If the electrode is dry, the spark plug is normal. If the electrode is wet, check the damage and electrode gap as below.
[Component Inspection]
1. | Check the spark plug for any damage on its thread and insulator. If there is damage, replace the spark plug.
2. | Check the electrode. Measure the insulation resistance with an ohmmeter. If the resistance is less than the specified value, adjust the electrode gap.
Specification: 10 MΩ or more
3. | Check the spark plug electrode gap. If the gap is greater than the maximum, replace the spark plug.
Specification: 0.7 ~ 0.8 mm (0.028 ~ 0.031 in.)
• | If adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap on a used 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 80°C.
3. | Keep the engine running at 2500~3000 rpm in the N position for 15 minutes.
[2nd Method]
• | 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.
2. | Drive the vehicle for over 20 minutes, keeping the engine speed above 3500 rpm.
• | If equipped with manual transaxle, shift the gear properly for keeping the engine speed above 3500 rpm.
Removal
1. | Remove the ignition coil. (Refer to Ignition System - "Ignition Coil")
2. | Using a spark plug wrench, remove the spark plug (A).
• | Be careful that no contaminates enter into spark plug holes.
Installation
1. | Install in the reverse order of removal.
Tightening torque: 14.7 ~ 24.5 N.m (1.5 ~ 2.5 kgf.m, 10.8 ~ 18.0 Ib-ft)