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civic idles high

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Old 02-13-2005, 06:11 PM
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Default civic idles high

when i start my car, it idles hight around 2500 rpms and after about 5 minutes it goes down to 900 rpms, anyone know how to fix it? it only does it when it gets cold, but when it's warm it still does it but idles at 1500!
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Old 02-13-2005, 07:03 PM
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Default Re: civic idles high

Did it just start doing this? Is it a swap or original engine? Does it do it when it's restarted after it's warmed up or just when it's cold and hasn't been driven?
Maybe coolant temp sensor, maybe fast idle thermo valve.. Could be a couple of things actually. Need more info, anyone have any other ideas?
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Old 02-14-2005, 07:29 AM
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Default Re: civic idles high

Originally Posted by Fabrik8
Did it just start doing this? Is it a swap or original engine? Does it do it when it's restarted after it's warmed up or just when it's cold and hasn't been driven?
Maybe coolant temp sensor, maybe fast idle thermo valve.. Could be a couple of things actually. Need more info, anyone have any other ideas?
i think all civics do that... i mean at least all that ive seen...(OBD 1) its just a warm up cycle ... just an opinion
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Old 02-14-2005, 09:32 AM
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Default Re: civic idles high

2500 is awfully high though...
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Old 02-14-2005, 09:37 AM
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Default Re: civic idles high

it's a ex motor in a dx body,after it warms up, it doesn't do it as bad but still does it. it's been doing it for a couple of months,it dosen't do it as high when it's warm!
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Old 02-14-2005, 11:17 AM
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Default Re: civic idles high

Originally Posted by 1qikcoupe
it's a ex motor in a dx body,after it warms up, it doesn't do it as bad but still does it. it's been doing it for a couple of months,it dosen't do it as high when it's warm!
do u have a thermostat in it??? im kinda thinkin ect, then again u do have the iac (behind throttle body) and the fast idle valve (underneath the throttle body)
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