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High Idle at startup

Old Mar 17, 2025
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High Idle at startup

I replaced the Idle control valve, map sensor, and throttle positioning sensor, it was surging at idle previously. Now when i start it up it revs to 3000-4000rpm and wont come down unless i disconnect the map sensor or place my hand over the intake.
I have checked the vacuum lines for leaks and cracks in the lines, all seem to be good. Not sure about the vacuum switch?
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Old Mar 17, 2025
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Re: High Idle at startup

Aftermarket parts?
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