So i've got a 94 n/a, and i've got the plenum off to do a couple bypasses with the coolant lines since i had to replace injectors.

For the egr delete, i found a diagram (i believe on here) that shows the vacuum line layout. Now, i see that the egr gets vacuum from the egr solenoid, which also provides (or receives?) vacuum to the aiv solenoid. My issue is, i'm almost positive mine did not have that line going to the aiv, nor do i see an aiv anywhere.

This leads me to believe a couple things... either not all come with aiv (which i haven't seen anything in my searches), or its already been deleted. If its been deleted, there should have been an ecu swap if i'm not mistaken. How would i tell if its the factory eco or the swapped one?