after driving highway speeds, RPMs dropping out at stop light

Well, I replaced the IAC with a MOPAR unit. It still does the drop out, but not as violent. any other thoughts?
 
Any check engine lights or error codes? It sure sounds like a vacuum leak to me.
 
Did you ever check the manifold gasket? Mine was doing the same thing like I mentioned and it was fixed when the manifold gasket was replaced. I had leaks all around the manifold.
 
Ahoragi said:
Did you ever check the manifold gasket? Mine was doing the same thing like I mentioned and it was fixed when the manifold gasket was replaced. I had leaks all around the manifold.
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I completely forgot about your fix. thank you. I will try that this weekend and see what happens.
 
Check your throttle position sensor. I had the exact problem. New tps fixed me right up.

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