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High Idle Speed

12-28-2008, 09:03 AM
I have a 2000 Sonata 4 cylinder auto. It idles at 1500 rpm even when warm. Any suggestions as to the cause. Car has 48,ooo KMs and a new set of plugs and a new alternator recently. Thanks.

02-10-2009, 09:39 AM
You need a trouble code scan. See if you have a code. It's either an intake leak, or perhaps the Idle speed actuator is bad.

09-20-2009, 11:33 AM
That happened to me once and the problem was a leaking clutch fluid container...if your car is a manual that may be the problem.

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