Cleaned it. No change

No idea how holding the brake would help.

I wonder if the IAC (and/or maybe the wiring going to it) has failed. When replacing injectors, wires get moved around and maybe one of them had enough.

I had someone suggest to me that it was the Schrader valve o ring because I smelled gas over near it and it seems that it is leaking, but that still wouldnt explain the hard starting. I think there was also a vacuum leak with the brake booster line, but it is fixed i think.

It could. If it is letting fuel out, then it could be letting air in after fuel pressure drops near zero. Enough of this could allow a bunch of air to gather as fuel is allowed to siphon back to the tank.

Either way, you shouldn't start it at all with a known fuel leak.

I mean I dont see any leaks from it, just a smell. And it'* my only car really so I kind of need it

Since we are discussing the IAC cleaning, I want to add this information to this thread: https://www.gmforum.com/normal-maint...2/#post1597076

The fuel pressure regulator was mentioned back in post #2 and a simple test for fuel leaking from the FPR should be checked.
You can fast forward to the FPR at 1 minute and 49 seconds approximately.

I get that, but if it'* leaking enough to smell then there is some potential for fire. Perhaps it leaks more when under pressure and heat while driving and you're smelling the leftover vapors. Perhaps not. I can't tell how bad the leak is through my keyboard so I'll err on the side of prudence with my advice and let you decide.

If the fuel smell persists after a couple of drive cycles then you have a leak. It'* probably related.

Ok thanks. Do you know if there is a way to remove the valve and check

It would be better to find the leak first, then check what'* next to it.

So I think the valve was the issue. replaced it and it seems to start well now