Idle problems

[07GtS197]

This is a loaded post so be prepared for a lot of reading. So it all started maybe a year ago where I started getting an exhaust leak and got lean codes for bank 1. I kept tightening it but I later found that the nut on the manifold flange is stuck halfway down the stud so it wont sit flush. I used a hose clamp to temporarily fix it. In the meantime I noticed that the idle sits around 1200 rpms and stays there and I got a slight misfire. Well one day it all of a sudden started idling like crap misfiring like crazy. I have been datalogging and all I see out of whack are bank 1 is pulling a lot of fuel (its running super rich) and the fuel pressure is anywhere from 2-10psi. But sometimes it will sit at 45-50psi and when I was poking around today I noticed the tps isnt putting out any voltage and unplugging it and the iac do nothing. Its weird because sometimes itll run horribly and have low fuel pressure and other times itll run better but have really high fuel pressure.

Ive unplugged the frps and attemped to start it but it wont start. Also it seems that unplugging the vac line does nothing. Also throttle tip in, lugging the motor and stepping on the gas (or any quick changes in throttle position) will cause misfiring.

I cant find a common issue with any of this except maybe a fried ecu.

Here are a list of codes its throwing
P0102, P0113, P0190, P0301, P0302, P0316, P1132, P1152 and P1506. Ill have to check again because I think its throwing more codes now. A few of them are from me unplugging things to diagnose the issue. Any thoughts or where to start?

 

[07GtS197]

I installed a spare iac I had lying around earlier for shits and giggles. It immediately ran perfectly and even stepped down from high idle like its supposed to. I even blipped the gas and she responded right away. Then I took her out for a spin and the same throttle tip in and wot miss came back. After I got back I let her idle and it was missing but not as bad as before. It seems that the iac was part of the problem anyway and I think its heat related. Nothing seems out of the ordinary in the datalogs, even the fuel pressure and trims were fine.