Z won't idle? No codes...

[bottledbird68]

Ok, haven't even popped the hood yet but I have a few minutes to kill between coats of paint so figured I'd post up.

Hopped in the z to go pick up a couple things. Car ran fine when we parked it a couple days ago. Starts fine, runs ok going down the road, just won't idle on it's own. Idles fine at whatever rpm I keep my foot at though.
It's not throwing any codes. Any ideas? I'll double check the intake track make sure it's tight but beyond that what won't throw a code on an lt1?

Or is the car just jealous I've been spending all my time the past week on her subie and it'll straighten itself out when I start on it in the next couple days lol?