Sporadically in wet or damp conditions the car on startup my rev past 5000 RPM and will not stop. Touch accelerator with not change, must turn off and restart several times. Car will also while in motion display "service engine immediately vehicle speed limited due to malfunction. Speed is not limited, the car will accelerate on it's own. Hit brakes and release and acceleration will reoccur. Can set cruise control in this situation and car will accelerate past settings until and error appears disabling cruise control and car will keep accelerating until I hit the brakes once released car will speed up again. Only way to stop is turn the car off and on several times.

The have been multiple times, has happened during rush hour on highway, side streets etc. I have had the vehicle in 2 times and dealers states there are no codes in the onboard computer. The dealer has had the vehicle but code not recreate. Dealer had the vehicle in a snow but did not want to drive it since bad road conditions but this is when it usually happens and had safety concerns. Contacted Hyundai and customer service stated they will not help me unless tech can recreate the exact issue.