Question about 2001 Hyundai Accent

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Hyundai Sonata 2002 idle at high RPM and accelerate 40-45 MPH

I have a Hyundai Sonata 2002 that I have replaced the idle air control still not fixed. It will accelerate to 40-45 mph on its own and idle to 2500-3000 rpm. I have to constantly hold the break while driving. Very dangerous! Can anyone suggest?

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Try To Disconnec The Catalytic them drive it mostlikly is goin to be bad cat

Posted on Nov 11, 2012

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Look for a vacuum leak somewhere. This is the most common problem for a high idle.

Posted on Jun 23, 2009

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