Toy_Runner- I looked at my engine today for the hose in the first pic, but wasn't really able to tell since there's a mass of hoses there. Try to trace the hose back as far as you can; perhaps that will help. Is there any vacuum on the hose when the engine is running? Another thought is the windshield washer tubes for both front and rear route in that area.

In the 2nd pic I believe it is supposed to be plugged off like that, but I'll repost if I'm wrong.

The 3rd pic isn't really decipherable. Where exactly is this located?

~R

94 4Runner 3.slow-5spd, 4" coils, 1.5" BJ spacers, 2" BL, 35x12.50 Nitto's, 5.29's with a front Lockrite and a rear Detroit; 250k miles and lots of offroad time...and by offroad I mean on jackstands.