Inspect your spark plugs as described in chapter 7 and replace them if necessary. Also check all ignition wiring and components to be sure they are not cracked, worn or damaged in any way.
Change to "winter weight" oil if
necessary
To keep locks from freezingKia Cee'd JD Service Manual: Troubleshooting
Troubleshooting
Symptom
Suspect area
Remedy
Engine misfire with abnormal internal lower engine noises.
Loose or improperly installed engine flywheel.
Repair or replace the flywheel as required.
...
Kia Cee'd JD Service Manual: Description and operation
Description
The Dual Clutch Transmission (DCT) control system measures required data to
identify the state of the control target and computes the appropriate compensation
value if adjustment is necessary. The actuator is controlled according to the
computed compensation valu ...