Vacuum diagram

2003 KIA OPTIMA
159,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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BRICE THIBODEAUX
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  • 1 POST
I have high idle replaced all the vacuum lines EGR valve and idle air control valve did not do electrical test or resistance for anything. I did clean the and take replace the 02 sensors up-and-down stream and the exhaust manifold gasket.
Oct 26, 2020 at 9:22 AM
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JACOBANDNICKOLAS
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Hi,

I have attached the vacuum schematics for the vehicle. Have you checked the PCV system? See pic 3 regarding the system. Also, here are two links. The first explains how to find a vacuum leak and the second helps with high idle issues.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

https://www.2carpros.com/articles/engine-idles-too-high

_________________

Let me know if this helps or if you have other questions.

Take care,
Joe
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Oct 26, 2020 at 1:07 PM