I had a verry sim problem.... Had the dealer do an update on my computer... Then got a cold air intake, flowmaster exhaust, and new plugs and wires... Car excells great now.. As far as the rpms going up when you come to a stop.. Been there done that... At first the dealer said it was the transmission sylonid pack.. Fixed the problem for about a week.. Then they pulled the tranny and said a seal went bad causing the problem.. Hope I could help
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