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I have an AT 2001 Kia Sephia LS...My idle is sometimes fine and sometimes rough and very very low...so low that the car will die. I got the codes checked at Autozone and the IAC valve came up numerous times. Kinda spendy $130 part so I dont want to buy it unless I know for sure. Does this sound like the likely cause? Where is this located on my car and is it an easy fix? All help is greatly appreciated.. thanks
 

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99 Kia Elan 1.8L, 17 Ford Edge Sport 2.7L V6, 15 Mustang 3.7L V6, 2013 BMW K1600 GTL
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The IAC could lead to incorrect idle speed, and most often can be sorted by cleaning with carb cleaner. It's mounted on the throttle body.
Take a look at the KiaTech wen site and you'll see pictures of the mounting location.

If it's misfiring, then it's more likely bad spark plugs, HT wires or coils.
 
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