Maybe you jarred some crud loose in the ICV. I would take it off and clean it out with carb cleaner, just to be sure. They get pretty dirty from the crankcase gasses going through.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma