Long story short: my 91 Camaro RS 305 has been running like absolute garbage lately and has become fond of shutting off while running at seemingly random times.

I've just performed the paperclip trick and discovered codes 33, 34, and 54. Two of the three point to my MAP sensor being out of whack.

When going to remove it in an Autozone parking lot I discovered the root of my problems, I think: The vacuum hose coming out of the MAP sensor isn't actually plugged into anything on the other end.

I've spent a few minutes searching and can't find an empty vacuum hose port where it should go. Where does the MAP sensor vacuum line plug into?

EDIT: I'm an idiot. Five minutes after posting I realized I could just look up a vacuum diagram. It turns out the reason I can't find an empty slot for this hose is because the hose snapped in half, leaving half of it sticking out of the TBI into a cluster of hoses as if it belonged there. Now to begin the journey of finding that exact hose on AutoZone's website!

 

Typically, those vacuum hoses are universal. Just buy a length of the correct diameter (match up the existing hose) and cut it to length.