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Discussion Starter · #1 · (Edited)
Hi all !

Have a 2000 sephia LS automatic 1.8 liter

I have a high steady idle at 1100 rpm to 1200 rpm

No CEL light

Could this be a vacuum leak ?

Thanks
 

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01 Sephia, 12 300C, 69 Camaro, 85 Camaro, 99 F350SD, 01 E320 4Matic, 89 Bronco
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Sure could. Did it just start one day? Do you hear anything out of the ordinary?

Have you tried the idle adjustment screw? Does the engine start differently?
 

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99 Kia Elan 1.8L
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11,907 Posts
Sure could. Did it just start one day? Do you hear anything out of the ordinary?

Have you tried the idle adjustment screw? Does the engine start differently?
It could be a vacuum leak or a sticky Idle Air Control valve (IAC or ISC).

Please don't suggest adjusting the throttle stop screw which you have termed "idle adjustment screw".

http://www.kia-forums.com/487593-post6.html


From the KiaTech web site:
The Throttle Stop Screw is factory set and must not be adjusted. Any adjustment will negatively affect the engine performance.
 
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