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Old 06-15-2016, 09:15 PM
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2004 Jeep Grand Cherokee

I have high idle around 1800. Cleaned throttle body. Replaced TPS , replaced Iac (twice), all vacuum lines are good. Still running at 1800. Any ideas

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Old 06-15-2016, 09:43 PM
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Re: 2004 Jeep Grand Cherokee

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Originally Posted by Parkerj View Post
I have high idle around 1800. Cleaned throttle body. Replaced TPS , replaced Iac (twice), all vacuum lines are good. Still running at 1800. Any ideas
2004 Jeep Grand Cherokee. High idles at 1800 rpm. Cleaned throttle body. Changed TPS and Iac sensors. All vacuum lines good. Still idles at 1800. Any ideas
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Old 06-16-2016, 06:32 PM
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Re: 2004 Jeep Grand Cherokee

Did you check if the throttle valve closes completely in idle? If you have a scanner with live data, you can see the TPS output, which should be around 12% in idle.
There could be a problem with the IAC stepper motor. Did you check for any fault code(s) set?
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