While driving, the car loses power, as if the transmission stops working and then the engine revs up very high, but the car stops pulling. this happens while driving on straight a ways, has happened when crossing in front of traffic, doing turns. you have to let off of the gas and wait a few seconds and then when you press the has, the power suddenly returns. it just stalls out. there is currently a class action that includes this issue because so many experience it and hyundai says they can't find anything wrong.
I was traveling in a snowstorm on the highway. the engine began revving and the tachometer went way up. no traction control light went on and i began slowing down with vehicles behind me. i pulled through the traffic and got to the shoulder. the car was still in drive but the wheels wouldn't turn. i called the dealership and they said to have it towed. i shut the engine off, opened the door and tried again. nothing. no forward movement. after 10 minutes i tried again and it worked, i began moving forward. this happened ever half mile or so until i got to the dealership, 8 miles away. the engine light came on. they tested it and the service tech said the wheels must have been spinning and i should get snow tires. i assured him that the wheels did not spin. he stated that the computer didn't receive an error so there is not a problem. they reset the engine light and i left. it hasn't happened since, but now i am scared to drive if it snows again. you literally lose all forward motion on the highway and slow way down as you attempt to move to the shoulder around other vehicles. i sent an email to hyundai who said to take it to a different dealership. i originally took it to nashua hyundai in nh.