mmmm could be a tps i would also throw a fuel gauge on it and release some pressure and see if your getting a ton of air ive seen this happen a ton in az fuel pump heats up to boiling point and starts pushing vapor instead of gas then you let it cool off and it runs fine........just my 2 cents id test it first before throwing parts on it you dont really know are bad

 

I cleaned out my excessively filthy IAC valve and it runs fine. Thanks.