2003 Toyota Corolla Surge in RPM when starting the car

2003 TOYOTA COROLLA
50,300 MILES • 4 CYL • 2WD • AUTOMATIC
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PREMRAJRAJA
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My Corolla is having some surge while I start my car. the engine rpm starts around 1700 and it goes till 2000.It comes back to the normal idle level (1000-1200) in 5-6min. Is this a sign of some problem.Please advice me.
Feb 20, 2009 at 7:15 PM
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MMPRINCE4000
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Clean (or have cleaned) your IAC (Idle Air Control) valve and check for any vacuum leaks.

Normal idle on the 1ZZFE engine (no loads), is >1000rpm, usually around 950 or so.
Feb 21, 2009 at 8:32 AM