Did you unplug the ICV with the engine running? Actually you can unplug it with the motor off. When you restart it, you should see the idle RPM go up.

When my dad owned the car, he said it stalled out at weird times, usually while slowing down to take a turn. The prior owner got rid of the car for that reason. It happened to me once in front of my house.

I did discover a loose connector on the module behind the passenger side kick panel. It was only attached half way. I pushed it back on tight and it never stalled since. But I can't say for absolutely sure that was the cause.

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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