Okay, so like a good boy I made sure to mark where each hose went, those little vacuum hoses (numbered) on the passenger side of the plenum are the ones I am mainly concerned about.

1st, out of curiousity, what the heck are those for anyway?

2nd, and more important, is there a diagram anywhere that shows me where they should go?

The reason I ask is because this engine has been apart before I bought it, I know because someone used orange gasket sealer on the valve covers, Toyota doesn't do that.

There are 7 little hoses, and like the big cartoon rooster, fortunately they've been numbered for just such an emergency. However, the way they are put onto the intake seems odd to me.

The top little plastic piece (non-tech name) had three nipples for hoses. On that was *, 1 and 2. The lower set has 3, 5 and 6, and a random one all by itself is numbered 4.

Now the way my brain works says that those should be set up 1,2 and 3, and 4, 5, and 6, with the *(star) going by itself. Or maybe *=0 and that could be *,1, and 2, but then 4, 5 and 6 should be together eh? Or at least 3, 4 and 5?

Shouldn't there be SOME order to these? They run to little circuit type plugs over on the side of the engine compartment.

Thanks!

 

i wondered the same thing when i tore mine apart...no clue

 

i have recently taken my upper intake off. The cluster of three hoses at the top of the intake is the 4x4 and the 3 lower hoses connecting to the metal tips 1 is for EGR, 1 for Fuel Pressure Reg and i have no idea about the 3rd. Make sure that the line pulling vac full time is connected to the Fuel Reg!

hope i helped

 

Found some pics and diagrams on here, I think I'll be okay.

Like I said, this is how I found them, and I can put them back where I found them. The truck was running fine, no problems at all (minus the gas leak on the fuel damper, hence why I have the plenum off anyway), so if I put them back where they were that should be okay.

Mike

 

I just wanted to add some pics that may help others... I printed this pic out and labeled each of the openings on the plenum, then put wire markers on each of the corresponding vacuum lines.

 

Ok, I just re-did mine,Was wondering if I had a vacume leak and found a few and some that were plugged up, I will take some pictures and label where and what they do.
I have 3 books and none are show some of the hoses I found but using a little common logic sence I figued what they do.

 

Thanks, just when I went to put them all back on I realized my TVV was broken.

NEAT

 

Now I know how to fix it

https://www.yotatech.com/forums/show...&highlight=tvv

 

3.Slow vacuum and plennum hoses
Ok here goes
This is being viewed from the passenger fender except fig 4.

1. AS Read Valve (kinda square box directly below it 4")
Other end to the atop the aircleaner.
2. PowerBreak booster
3. PCV valve on passengerside valvecover
4. AC throttle up connects to Fig 3. #17 See note 1.
5. AC throttle up connects to Fig 3. #16 See note 1.
6. Fuel Pressure return (connects to same size fuelline running up
firewall, Hoseclamps manditory) Other end to the fuel pressure
regulator near the ThrottleBody.
7. Powersteering Throttle up, Connects to the valve at back of
powersteering pump.
8. Same as #7
9. Fuel pressure relief, Connects to red VSV relay fig 2. #22
10. EGR , Connects to green VSV relay fig 2. #23
11. EGR , Connects to green VSV relay fig 2. #24
12. AS Read Valve dashpot, connects to blue VSV relay fig 2. #20
13. AC throttle up connects to Fig 3. #18 See note 1.
14. Few conncetions with two "T" junctions in line, CruiseControl, Fuel
pressure relief, Connects to red VSV relay fig 2. #21, ADD checkvalve
(See note 1) Fig 4. #25.
15. AS , Connects to blue VSV relay fig 2. #19

Notes
#1 By the use of caps on 4,5 and 13 in fig 1., This vehicle ether does not
have AC or ADD 4WD.
#2 locations 5 and 7 are for idle up perposes, The other end of that goes
to the IRS just below aircleaner and next to radiator.

 

It wouldnt let me add this same time.

Maybe this might be worthy of going into the Tech writeup section.

 

iam haveing the same problem with vacum lines on my 90 toyota 4 runner

 

I never noticed any problem, but in the last week or so I have noticed that my 4Runner runs really rough for the first few minutes after I start it up. Once it "clears" that out it runs fine, but idles really choppy and doesn't sound good, but if I give it a little gas and let it warm up a bit (sometimes less than a minute) it runs great until I let it sit for several hours again. I am now wondering if there's a hose that's not routed correctly. Never had this happen before.

 

I am new to Yotatech and just had the engine out of my 93 p/u, when i put it back in, i tryed to engage 4WD, but nothing happened, no light or front drive. I also had some lines on the plennum i didn't think were right. I needed info i couldn't find in a manual and ^VOODOO^'s pics str8ened everything out. Runs better and i have 4WD too! Thanks much, this place rules!

 

A regular haynes manual has the diagrams, either in the back, or in the emissions section.

 

I have pics in a recent thread entitled "Inspired to dive into 3vze!" that might help...

 

Many thanks VooDoo - printed and added to my FSM.

A copy of this deserves to be in the tech archive.

 

This is what I was looking for! Thanks Voodoo!

 

In 4 and 5, shouldn't 17 and 16 be reversed? I only say this as one port one the plenum is larger (5 in your pic) than the second one (4 in your pic)and one of each to match the port on the ac speed controller.

 

just a quick question, can anyone tell me if 4 and 5 are backwards in this diagram, because one line is bigger and doesnt fit?????

 

i also would like the answers to those questions, thanks in advance