vm1015

i know one goes to the pcv valve...the rest im not sure, and im not happy admitting it...ive looked through some digrams but for some reason those always seem to be left out...i bought this truck about 2 weeks ago and it was idling high...i did the valve cover gaskets, the intake manifold gasket and several hoses...

sebastianholmes

well for starters you might try telling us what kinda motor we're looking at. and i would say some vacum hoses go there lol

vm1015

makes perfect sense huh? its a 3.0 on a 93 4runner... i know they're vac hoses, but where do they come from is my question...i had several hoses that were capped off, but didnt notice till after the purchase...somebody was just really lazy...

justin_4runner

2 of them go to power streering pump and one goes to booster

willyt4r

here is a guide:
www.toyota-4runner.org/classic-t4rs/83486-color-coded-vacuum-lines.html

Team420

Make sure you get the 2 that connect to the power steering pump hooked up the same as they came off..... it will work if they are reversed, but will likely shorten the life of the ps pump....

Marc

Are you sure about that?

Team420

not 100%.... but I think I got mine backwards last time I was in there, and am noticing some air bubbles in ps fluid, and it seems like the power steering kicks out occasionally.... not sure if its cuz I got those lines backwards, or because its got a lot of miles on it.... but I have been told by more than 1 yota mechanic that its not good....

Wrenchinjoe

This thread has good diagrams.

https://www.yotatech.com/forums/f116...erence-113572/

vm1015

ok so alittle more explaining please...does the pcv valve hose go to the green arrow? and to what color arrows does the power steering pump go to? i guess i still need some baby explination to all this...sorry guys...i dont wanna get it wrong...

scope103

Maybe this will help:

Wrenchinjoe

I found this a while back but have not been able to find the link. I think it was posted by Bugs1961, but my apologies if that reference is wrong.




Here are all the hoses on the pass side of the plenum. The item numbers correspond to your picture with the numbers. Toyota numbered the vacuum hoses and it looks like yours are still numbered correctly from your pictures. The vacuum hoses are the small hoses and the larger hoses are air hoses, fuel hoses, brake booster, and PCV hoses. I list the Toyota vacuum hose numbers as printed on the the hose itself as well as where it goes. Front and rear refer to the truck front or rear. There are three VSV's (rear, center, and front) and one AC idle up valve.




1. Reed valve
2. Fuel return hose
3. Brake booster
4. Rear air hose at the AC idle up
5. PS pump valve
6. Front air hose at the AC idle up
7. Vac hose #1 to pass side of rear VSV
8. Vac hose #2 to pass side of center VSV
9. PCV hose
10. Vac hose #5 to driver side of center VSV
11. Vac hose #3 to pass side of front VSV
12. Vac hose #6 to driver side of front VSV
13. PS pump valve

Vac hose #4 goes from driver side of rear VSV to the reed valve

AC idle up vacuum hoses:
- pass side to diaphragm (very short hose)
- driver side tee's into vacuum hose #2 (item 8 in your picture)

bugs1961

[QUOTE=Wrenchinjoe;51671883]I found this a while back but have not been able to find the link. I think it was posted by Bugs1961, but my apologies if that reference is wrong.


Here is the link those came from: https://www.yotatech.com/forums/f116...e-help-209069/

I did the identifying but KHIG made the great picture. Post #1 has the photo and post #11 has the IDs. It's a worthwhile thread to go through if you're having vacuum problems. Good luck and have a great day,
Bugs

Bills86e

The Modulator is an air filter for the egr valve, so it gets clean air/vac.
https://www.yotatech.com/forums/f116...l#post51141054
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.

Akira

Anybody know if there is a gasket or do I use FIPG for #9 above aka the PVC connection?

scope103

Probably 12255-65010 https://parts.lakelandtoyota.com/sho...rimLevel=18380 . But it's only trying to keep the vacuum in, so unless I was ordering a lot of other stuff, I'd go with RTV.

FIPG? The advantage of FIPG is that it sets REALLY fast. If you're a professional mechanic, need to get this truck out of your bay, and never need to reposition a part, this is pretty good. I'm no professional. Sometimes, after I put a part on, I need to reposition it a little to get it to fit right (think valve cover gaskets). In the grand scheme of things, I'm not in a hurry. So I use RTV. It sets more gracefully, and I can always give it 24 hours before I need to start the engine. Your choice.

Akira

Thanks! I'll spread a little RTV on there.

Co_94_PU

iTrader: (-1)

I'm not reading all this but I feel confident, if you're putting sealer on a hose just replace the hose and clamp... Worth every penny for piece of mind.

Akira

Its actually not the PCV hose but some flange plate that bolts to the manifold with a nipple for the hose. The question is if the flange plate needs a gasket/sealer at surface contact to the manifold. I assume the pressure is low enough that it's not crazy critical