My Sportage 2001 have a engine problem. when I drive around and the RPM is about 1000-2000 the engine stutter and runs rough. When I trottle up there seems to be no problem or less problem. I drive in second gear in 15-30 miles my car feels like a kangaroo. There are no engine fault light and with my OBDII tester there are no missreadings. Do anybody have the same problem? Please reply if any can.