Locating Vacuum Line Inputs
 

Greetings. I have a 2002 Ford Ranger with the 2.3l engine. About a year ago, I did some work to the intake manifold, and ended up not being able to locate the spot for the rear air hose shown in the first two pictures. I'm trying to figure out where this hose goes, and I haven't found anything online. Thank you.
https://cimg3.ibsrv.net/gimg/www.ran...6f5b251e0f.jpg
https://cimg3.ibsrv.net/gimg/www.ran...0ca87fbd59.jpg

Is it a vacuum hose?

Or is it a breather hose for crankcase ventilation

Larger vacuum hoses like that go to Brake Booster or PCV Valve
OR the Breather hose for PCV crankcase ventilation

There is a pre-formed hose that goes from that nipple on the intake to the PCV valve on the driver side of the block.

It appears as though yours is missing.

https://cimg4.ibsrv.net/gimg/www.ran...1e2ad2878c.jpg
i can,t find this line anywhere, please help. penciled in green.