Supercharged 80 Series Idling problem (1 Viewer)

[Floki]

Hey guys trying to figure out what's going on with the engine here. Just a little backstory the Cruiser was recently purchased and has had a small coolant leak and oil leak. Nothing too major. I know the engine is going to need work and, plan to rebuild anyway, but I'm curious if anybody has run across this problem with the odd idling. When in traffic it's almost like the Cruiser wants to shut off. Also, almost forgot my wife accidentally put 85 octane in the vehicle when premium has all that's been used.
Linked video of vehicle down below.
https://youtu.be/Ktn_cIkhgfs

 

[logicbyondreaso]

Check fuel pressure regulator.
Check for any bad vacuum lines.
May need to clean Idle Air Control Valve (IAC).

 

[tacocat]

What’s causing your Check Engine Light?

 

[Squash]

My SC'd 97 occasionally hunts for a TPS signal at idle, it will read 0 or somethinglike 0.4, TPS is active with rpm according to my reader. Found that if I am stopped at a light for instance, magically you hear and feel something and behold the TPS in range at idle. This is normally after a good warm up cycle. Not a huge issue and I will probably tackle it if I change out the bigger injectors I've had laying around for a few years.
Get your code read, check vaccum lines all the easy stuff first.