Strange noise after cold start?? on 2006 Chrysler Pacifica

I have the 2006 Chrysler Pacifica. I start the engine after a cold start and it has a rough idle for the first minute or so...making a strange noise. Any ideals what the problem might be?

Asked by for the 2006 Chrysler Pacifica
Rough idle for a minute seems like a long time. Has the car had any mainenance in the time you've owned it? You don't say what the mileage is or when it was last tuned up. Also, please describe the noise. Is it squealing, grinding, what? The noise could be a drive belt or a rotating part like the alternator or power steering pump. Give us more..
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I bought the car used a couple of months ago with over 79,000 and we was running great. No i have not had it service since i purchase the vehicle. The noise is more of a grinding when the the engine is goes away when the engine warms up.
Hope this helps....thanks again.