The VSV on the left ups the fuel pressure in 4WD when your engine is to hot by venting vacuum to atmosphere...

I don't think it's really needed, and it's for such a small percentage of running conditions, you really don't need it.

For that one, connect the 2 hoses that go into it together, omitting the VSV.

(the hose will then apply vacuum to the the fuel pressure valve to vary pressure depending on intake vacuum).



I don't have the VSV on the right, but it looks like some sort of smog thingie.    

I would think that plugged up the engine would run better (although with more smog), but you could try connecting the hoses together like the VSV on the left......