why cold start idle so high

It doesn't stay that high more than a few secs. I already found out that "spikes" are normal as long as idle comes down. We just bought this car, changed the oil today. We used 5/30 full synthetic as that is what previous owner used. So far so good, love the car, just need to do a few minor things to it. My husband has been a mechanic all his life, but not on toyotas or newer cars so just need to be brought up to speed on some stuff. Thanks for your reply!

Now if we get a response from 'joanie3' , that would be ............hey! Squirrel! I gotta hit the road and in 32 miles i"ll be at 338K on my Camry! This time you'll see proof in about 35 minutes.

Can't beat 'em!!... I'm not sure this 'chained' engine will do that without some work... So far so good @ 190k...no rattling yet! .. Little valve seal smoke on first start but don't add any oil between service.... I ain't touching it!

Marvel Mystery Oil! try it!.....Happy day!

Firm believer in it already!!!

What do you mean, mystery oil? Is that an additive of some sort? I noticed you didn't comment about the full synthetic, as to wether it is good or not so much. Guess doesn't matter much, it has been used, so we were told, and once synthetic is used we understand from others we must contiue to use it. Thanks again for your tips.