S2000 Under The Hood S2000 Technical and Mechanical discussions.

High idle at cold start?

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Old 08-02-2005, 06:12 PM
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Default High idle at cold start?

My car idles @ 2k when cold start, but when warmed up it goes back down to .9-1k. Is that normal?
Old 08-02-2005, 06:17 PM
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yep. normal.
this feature is not only due to the fact that the car needs more fuel to stay running when cold, but due to our air quality standards, more airflow helps to ignite the catalytic converter sooner. (its like a little oven that burns off any unburnt fuel). so yeah, dont worry. im a picky person, about engine internals, and i wont drive my car till it has idled down below 1500 rpm. gives the parts time to warm up, and the controls to come *online*. later dave
Old 08-02-2005, 06:21 PM
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ok, thats a relieve. Thanks a lot.
Old 08-02-2005, 07:53 PM
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In the good,old days,they used to call thata "choke".
Old 08-02-2005, 08:38 PM
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Originally Posted by S2oooNvegas,Aug 2 2005, 10:17 PM
so yeah, dont worry. im a picky person, about engine internals, and i wont drive my car till it has idled down below 1500 rpm. gives the parts time to warm up, and the controls to come *online*. later dave
Ummm.. afaik, the engine internals and catalytic convertor will warm up much faster if you idle the car 15-30 seconds and slowly drive it, than if you just sit there and idle. Never mind the oil contamination and environment pollution.
Old 08-02-2005, 08:55 PM
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yeah, if you watch it, it prob takes about 30-40 seconds to come down off fast idle, to 1500. im usually drivin in less than 1 full minute, id guess.
Old 08-03-2005, 05:58 AM
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got ya.. thought you were talking about idling until the revs go fully down to 1000 rpm..
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