Need Vacuum Hose Expert Advice....

[Tkelly5]

Team, have a good one fer y'all.

1991 4Runner, 2WD, 3.0L, 3VZE, non-california, 257,000 miles

I located a loose vacuum hose today. Picture attached. (#1) of the hose.
it comes off what looks to be a "y" barb on the hex fitting shown, and the other end is dangling by the power steering unit. I can not see any easy connection that looks like it is missing a hose.

To help everyone locate this hose/fitting/picture, it is the passenger side of the aluminum Manifold. for reference, the Top hose, #2, terminates at the #3 VSV, which is for the EGR according to the FSM link, below.

http://web.archive.org/web/20100806...msour/1995/954runne/eg2/emission/layoutan.pdf

Can anyone point me to the right page/link in the FSM,or a link anywhere else online to help me figure out where this hose should attach to, or the part number it should attach to, so i can search it? anyone with a camera to shoot a picture of the part gets good karma!!

Thanks, appreciate the help!!

I have rescued this 4Runner from the scrap yard and after 3 months of everything i could think of, runs well, passed emissions. got the Mpg from 13 to 17.

Thanks,

TK:beer:

 

[mikebontoft]

agh I can't remember.. If I'm not mistaken it's the ADD (auto disconnect diff) vacuum source. I just did my valve cover gaskets this weekend so I took everything off. I just put them all in places I thought they should go though. everything works as it should. probably just got lucky.

 

[bills86e]

code 71 and vacuum lines. - Page 2 - YotaTech Forums
The VSV are Blue is PAIR, RED (brown) is for Fuel Pressure up and Green is EGR.


The top of the VSV is from the vacuum source and the secondary goes to the item its running.
EGR vacuum comes from 2 vacuum lines to the modulator then from there to the top of the green VSV, From the bottom of the VSV (bleed off filter) goes to the main EGR valve.
EGR only turns on when a cruise or light throttle is happening.


PAIR, From manifold to a one way valve then to of the Blue VSV top, Out to the PAIR valve.
Only turns on during deceleration.
Fuel pressure up, From Manifold to the Red (brown) to the regulator.
Turns on during acceleration dropping vacuum to zero increasing fuel pressure.
Fuel pressure up can be bypassed if the VSV is bad.
Hope this helps, Bill