S2000 Under The Hood S2000 Technical and Mechanical discussions.

Cold start rpm?

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Old Sep 16, 2009 | 11:03 PM
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Default Cold start rpm?

I have an uncomfortable feeling when I start my car after being parked for a week,The engine revs to around 2000 rpm straight away.I dont like the idea of an engine which has stood for a week with the oil drained to the sump revving to 2000 rpm(my mx5 used to do the same) is there any thing I could do which will stop it doing this?I.e. disconnect the cold start sensor,or wire a switch that will spin the engine over without the ignition on so at least the oil pressure is primed for when it does start?
I know that Honda know a lot more than I do about engines but it just seems to be a little aggresive to rev the motor so high from cold...am I being over cautious? does it bother anybody else when this happens? thanks in advance
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Old Sep 17, 2009 | 04:44 AM
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Mine does the same thing, but I just got it so I'm not sure what is 'normal'
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Old Sep 17, 2009 | 09:53 AM
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Honestly I don't think you have anything to worry about. There's always going to be a thin film of oil in the engine. Once the motor starts turning, the pump starts working and it will all get relubricated.

I've turned on my car from sitting in the garage for a week and the engine oil light goes out pretty quick.. quicker than when I do an oil change.
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Old Sep 17, 2009 | 12:20 PM
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[QUOTE=mr-pitts,Sep 17 2009, 12:03 AM]I have an uncomfortable feeling when I start my car after being parked for a week,The engine revs to around 2000 rpm straight away.I dont like the idea of an engine which has stood for a week with the oil drained to the sump revving to 2000 rpm(my mx5 used to do the same) is there any thing I could do which will stop it doing this?I.e. disconnect the cold start sensor,or wire a switch that will spin the engine over without the ignition on so at least the oil pressure is primed for when it does start?
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Old Sep 17, 2009 | 11:11 PM
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Thanks for the replys, my Harley does it aswell but it just makes me cringe when I hear them start like that.
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Old Sep 18, 2009 | 09:15 AM
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I think oil will drain down to the pan pretty quickly regardless of how long the car sits. Hot oil is pretty thin and runny. After 10 minutes of sitting, it's probably the same situation if it sits one day or ten days.
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