Anyone know where these vacuum lines go? 1991 3.0

[misterW]

Take a look at the pic, these are the vaccum lines that come off the back of the intake manifold, right near the distributor. You can see there are 3 lines that don't have hoses. I swear I labeled these. But somehow over the course of a project taking much, much longer than it should have...they're not labeled now, and I cannot find where they are supposed to go. I took a vid of the engine compartment before I took the engine out, but the file somehow got corrupted haha.

It's a 2wd, and I don't have AC anymore, so I don't need to worry about lines that do anything for that . Is there anything essential these lines are supposed to be doing, and if so, where do they get routed?

 

[Dirtman]

The brake booster and pvc line should be large diameters, the only smaller lines would be for the cab vents, dpfe sensor/egr valve, fuel pressure regulator and evap purge.

 

[misterW]

Thanks for taking time to answer, this was very helpful!