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High idle issue (need help)

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Old May 14, 2017 | 05:54 PM
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Gotit4cheap16's Avatar
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Default High idle issue (need help)

Haven't driven my car in about a year and just got the car back from my tuner about 4 months ago for starting issue. I get the car back and I now have this high idle start up issue and can't figure out what it is. Checked and unplugged IAC and did nothing. Checked for exhaust leaks and couldn't find any. What else could it be? Tuning issue?

https://youtu.be/8gTBb_-0X6I
https://youtu.be/84_KJaRVLS0

Last edited by Gotit4cheap16; May 14, 2017 at 06:54 PM.
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Old May 14, 2017 | 07:32 PM
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how high... what rpm
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Old May 14, 2017 | 07:42 PM
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Oops... nevermind. Watched the videos.

Has it always done this or is it a new issue? Is it at all possible that the throttle plate isn't fully returning to it's idle position? Have you tried closing it with your hand?

If it has always done it, there is a base idle setting screw on the bottom left side of the throttle body, if you're standing in front of the car... under where the throttle cable connects. May just need adjustment.

Or, it could just be that your IAC motor is junko.
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Old May 15, 2017 | 04:25 AM
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It's a new issue and I have tried closing it more with hand and nothing. I even also tried unplugging the IAC sensor and no change.
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Old May 15, 2017 | 09:39 AM
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You can test the coils of the IAC valve with a multimeter. There's 4 pins in the connector and there should be about 50 ohms between the two outer pairs... 50ish Ohms between pins 1+2 and 50ish Ohms between 3+4.

Or, I think they're about $20 if ya just wanna throw a part at the problem, which should solve it IMO. Unless it's an error in the tune/settings.
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