Vacuum hose near pcv valve

[HawaiiB2300]

Hello, I’ve got a 2001 B2300. It’s idling rough and almost dyeing so I’ve been replacing parts. I just replaced the PCV valve and while I was doing that, I noticed this vacuum hose hanging out. Can someone please tell/show me where it is supposed to be plugged into?

 

[Colin]

Whereabouts is that in the engine bay? I'm not familiar with the 4 cylinders

 

[HawaiiB2300]

Hey, thanks for the reply Colin. I think I figured it out. I found a spot in the bottom of the manifold. Unfortunately, it didn’t do anything for my idle and almost stalling when I’m at a red light. I’m continuing down the list of things to replace.

 

[Colin]

Tried cleaning the IAC yet?

 

[HawaiiB2300]

Yeah, that was one of the first things.
IAC
Air filter
Spark plugs...which led to valve cover gasket
PCV valve

Next up:
Fuel filter

 

[Colin]

Tried spraying around the engine with brake cleaner to see if the idle changes?