What year teg and how many miles?
When you cleaned the IACV what cleaner did you use?
When was the last tune-up?

I think you might want to-do a full tune-up on the car. Plugs/cap/rotor, fuel & air filter, PVC valve, and plug wires if needed. closely inspect every hose going to the Intake manifold and look for cracks or tears and replace where needed and reset the ECU again when done.