No big job of any kind. Went out one day and noticed a delayed start. Usually starts very fast. Runs great but if you don't keep the rpms above 1700, it stalls. Have not driven the car since for obvious reasons. I have an IVC on order so that was my guess too. Car has about 110K miles on it. It is my daily driver. I have 9 other cars but this one fits me like a pair of shoes.What do you mean by "below 1700"? If you're going down the road turning 1500, it stalls? Also, what do you mean by "higher RPM's are fine". Your post doesn't make much sense.
If it suddenly didn't want to idle, it is likely the idle air controller. Like if it was fine yesterday, but not today.
If it's not idling because you just put the car back together from a big job, or it sat for months or years, then it could be almost anything.
I haven't changed the IAC yet, it's still on the way. I don't see this as a vacuum leak because I have no check engine light or codes. If I had an unmetered air leak, I would expect a code for a lean bank. I will let you know after I change the IAC.Then the IAC isn’t the issue. You have an unmetered air leak.