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.
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Sunday, July 8th, 2012 AT 3:49 AM