I was under the hood today and found that this hose/line is not connected to anything. It had a rubber coupler on the end (not pictured), which made me think it used to be connected to another section of hose.... I am wondering if it should be connected, capped off, or neither.

The truck is a 1990, 22RE.



Thank you

 

I don't have a 1990 and the vacuum hoses are routed different from my 87. On the bottom of the hood there is usually a vacuum hose diagram that will show how to hook everything up. Refer to that.

 

That should go to a thermo valve on the intake somewhere. Its the purge line from the canister

 

If I remember right mine was like that too. I think it's some sort of vent to atmosphere,and it's just supposed to hang down to point at the ground.

 

That hose goes to a valve (purge) on the intake to burn off gasoline vapors. The other end goes to fuel tank. Some states will test the operation as part of a smog test, thus gas cap must seal properly.

 

If you look at the back of the engine near the firewall, you will see the Thermal Vacuum Valve, which looks like this:

Except yours is missing one of the nipples (well, you know where it went, it's in the end of the hose you're holding). There are those who say they've successfully repaired one, but I couldn't as the plastic on mine was too crumbly.

It's about $50 http://www.toyotapartszone.com/oem/t...925-05047.html . If you don't replace it (or repair it), the vacuum canister will not be emptied, and you will soon smell gasoline on the passenger side. (You will also have a tiny vacuum leak, but you don't need to worry too much about that.)

 

Is the pic your showing for a 6 cyl or 4cyl?

 

That is for a 6-cyl (I now see that Josh_Br has 4-cyl). Is the TVV different on a 4-cyl? Or is there none at all?

 

This is what I found, a little vague.

 

And there's this one:
http://personal.utulsa.edu/~nathan-b...ne/15layou.pdf
(Maybe even more vague).

But it appears that while a 22re DOES have a TVV (called a BVSV for Bi-metallic Vacuum switching valve, but apparently the same function) it is in the EGR circuit. The EVAP (canister) goes to the "purge" port, which appears to be directly into the throttle body somewhere.

I don't have a 4-cyl, so this is just a learning experience for me. Thanks for pointing me in the right direction.

 

I'm going to find a good pic of It
If possible, and just a side note I've learned a lot from your posts, So I Thank you

 

Found this, but its a turbo, not so vague though. Also looks pretty simple. You get the idea about same general location as non turbo.

 

Thanks guys, this is all helpful. I ended up plugging it in to one of the vacuum ports on the intake that would be for the AC idle up valve because my truck doesn't have AC. I drove it for 45 min - 1 hour today. I didn't really notice any change, or maybe a very slight positive change in how it ran. I do feel good just knowing it's hooked up to something that is close to how it should be hooked up

 

see my thread about repairing the TVV

https://www.yotatech.com/forums/f116...ix-pics-84460/