Repair Procedures: 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.

Fig 1: Engine Running Timing Pattern

Courtesy of HYUNDAI MOTOR AMERICA

[2nd Method] 

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.
   NOTE:

   • If equipped with Manual Transaxle, shift the gear properly for keeping the Engine speed above 3500 RPM.
   Fig 2: Engine Speed Timing Pattern

   Courtesy of HYUNDAI MOTOR AMERICA