On the Tiburon it is referred to as the Idle Speed Control Actuator. It is located on the intake manifold near the throttle body on the backside.
I attached a diagram with locations of components.
It does sound like it could be the ISC. However, I would go and get the trouble codes pulled. You don't have to have a check engine light for one to be present and it helps in finding the problem.
Any Advance Auto or Auto Zone will do this for free.
Sunday, July 8th, 2012 AT 3:49 AM