after driving highway speeds, RPMs dropping out at stop light

[harper]

Well, I replaced the IAC with a MOPAR unit. It still does the drop out, but not as violent. any other thoughts?

 

[Chris]

Any check engine lights or error codes? It sure sounds like a vacuum leak to me.

 

[EJD]

Well, I replaced the IAC with a MOPAR unit. It still does the drop out, but not as violent. any other thoughts?

Is it stalling out completely or just low rpm's?

 

[Ahoragi]

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.

 

[harper]

Any check engine lights or error codes? It sure sounds like a vacuum leak to me.

nope, no lights on.

 

[harper]

Is it stalling out completely or just low rpm's?

RPMS dropping really low. when I step on the gas it sounds and feels like it will stall out, but doesn't. serious hesitation.

 

[harper]

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.

I completely forgot about your fix. thank you. I will try that this weekend and see what happens.

 

[fullagofast]

Check your throttle position sensor. I had the exact problem. New tps fixed me right up.

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[Chris]

Check your throttle position sensor. I had the exact problem. New tps fixed me right up.

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X2, great suggestion!