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We just replaced manifold gasket on nephews 2000 2.5 wrangler. Now it has intermittent high idle. If you blip throttle sometimes it snaps back to normal. Sometimes it takes its own sweet time or never returns to normal. We took out and cleaned the IAC valve. It was funky but didn’t change a thing. Don’t know what to try. We didn’t disconnect anything we didn’t Need to. I’m going back home in the morning so would like to solve soon. 

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