Here is my problem, when I start up my car it is a little shaky for about 1 min and then idles fine. when I put it in drive after its at about 140* temp the car has a slight stumble up to 2k rpms and then after 2k rpms its fine. after driving around for 10mins though it goes away..what can be causing this? it seems to be worse when the a/c is on. Help Please!@

 

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