High start idle, hard shifting from first to second

2005 NISSAN MAXIMA
77,000 MILES
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FLYTDAD3
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At first start of day or when the car has been sitting for a period of time, the engine idles from 1500 to 2000 rpm. After approx. 3-5 min. the idle will return to 6-800 rpm. The start up idle seems excessive and hard on a cool or cold engine. (I would expect maybe 1000or1200 for 2-5 seconds). Also at low speeds 10-25mph the tranny shifts hard from first to second and second to first.
Nov 13, 2011 at 12:35 AM
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RASMATAZ
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Do you have a check engine light?

Clean and test the IACV/AAC valve and the FICD
Nov 13, 2011 at 12:40 AM