Happy Fathers Day and Help me Mr Wizard

I’ve looked through my manual, can’t cypher this out.

on the passenger side of the intake, can you see the one hose kinda center underneath the two tops ones. It’s got the bolt in it, I can’t figure out where that goes.

Would someone be kind enough to post a pic or two of that side of the manifold showing where your hoses are routed too.

It would be greatly appreciated on this Fathers Day

 

That is what I got. If it is the one directly below the bigger hose then it goes to the 2nd pic which is just behind the battery. It is the middle sized hose. I just noticed that your hose configuration is a bit different from mine from where those 3 smaller hoses go. Could be the difference from 90 to 92.

 

Thank you trihiker, interesting I didn’t know there was anything down that way. I’ve got to head out for a few but will definitely investigate this when I get home, well maybe in the morning as it’s going to be like 109 degrees here today.

 

Well I can’t figure out, guess I’m gonna wait it out and hopefully come across another owner that will let me peek under the hood. My truck is running great so I guess there’s no need to stress on it. Had a major victory yesterday though. Went out to the local pick a part and found the little metal cover that attaches to the inner fender kinda covering the starter.

I felt like rocky on top of the steps LOL.....Gonna fly now ! Yeah I know but damned if the small things don’t count .


One thing is for sure, our trucks, in the junkyards, get stripped FAST ! There was literally nothing left of the 3 trucks they had.

Here’s a pic of the great victory,

 

On my 91, the 2 bigger hoses that are on the bottom of the manifold come from the air suck by the air filter and go to the AC idle up valve on the passenger side fender. Other than the EGR that we eliminated, our 4Runner vacuum system is stock. Would help if you have drawn an arrow on the hose in question....just saying...

 

It’d help if we were neighbors too and I could just come over and take look . I’m barely smart enough to post pics and now you want arrows.......jeeez....LOL.

 

Ok, I can appreciate that...how about taking a brightly colored piece of tape then and putting it on the item in question so we know what piece you are talking about?

 

Ok, I had to do a few things this morning, install the gaskets for the Aisin hubs, which I don’t understand why they don’t come with gaskets ? And switch out my charcoal canister. I snapped a few pics of the hoses this morning.

My truck is running the best it ever has, I’m getting great mileage and she’s smooth as silk. But I do have a few issues, with the AC on my idle is about 4-500 rpm, I think that should be 8-900. And to me the tail pipe exhaust smells a little gassy. I never adjusted the throttle after replacing the injectors, dampener and new gaskets on the top end. I’m thinking the gassy smell might have something to do with my hose arrangement.


The pencil shows the hose blocked off. I totally forgot to take pics before I took everything apart, thought I could remember everything then CRS smacked me !

Tomorrow I’ll take a few more numbered with tape.

 

I took this photo for you of my 91 engine. The hose you have a bolt in is the one I have yellow tape on and the hose with blue tape is the other hose that goes also to the ac idle up valve.

 

Fourtoad, that is really nice for you to do that and help me out. Good karma is heading your way, and Trihiker too.

Yep looks I’m like backasswards doesn’t it. I think the only one I have right is the PCV valve. I’m gonna go right to it in the morning and report back. Only cause it’s like 100+ degrees right now.

Thank you, Thank you, Thank you

 

So I re-routed the yellow taped hose to the right location, the blue taped one looks like I had that one right. It did make a difference, little smoother idle and with the AC on rpm’s are only dropping 100 and holding at 700 rpms now.

I’m looking in my Hayes manual now. Something is still missing. I’ve got it plugged off until I figure it out. Pretty easy too see, it’s the port directly behind the filter.

 

Ok, the blue line in my photo is the exhaust line and connects to a metal line that is attached to the underside of the intake manifold. The yellow line is the vacuum or suck line. It looks like you have the (yellow) line in the correct spot. I would check and make sure the (blue) line is also connected to the correct line at the manifold. The exhaust line is not as important as the suck line, you just have to make sure they both aren't connected to vacuum lines. As far as the line you will now have with no hose on it, I am at a bit of a loss and would have to look closer at mine tomorrow. We have a 5 Speed w/ A/C Runner and have deleted the EGR and put on headers, so it's not exactly stock anymore.

 

I watched every YouTube video I could find yesterday on the subject. Nobody’s done one that is clear and concise. Just a bunch of shaky cell phone incomplete stuff. My Haynes manual, 37 pages of emission and only 3 illustrations and they are vague for the V6. If you have a 4 cylinder man your covered !

The only conclusion I come to is something is missing on my truck. I’ll double check my routing again this morning and Thank you for being such a great help. Anyone know if the Chiltons manual has better info on the 3VZE engine ?

 

I'll be up at the shop in a little while and will try and take some more detailed pics of that area for you as well as look in my various Toyota manuals and picture any diagrams that relate to this for you.

 

Ok, used some more colored tape to help identify what hose goes to what. The yellow hose is still the suck hose that goes from the intake plenum to the ac idle up valve. The blue hose goes from the ac idle up and exits to a small metal tube attached under the intake and is just exhaust for the vacuum. The new red hose goes from the intake plenum to the pcv valve in top of the valve cover. They are all Toyota factory hoses we ordered and replaced. I hope this helps.

 

Oh this is what the blue hose attaches to under the intake.

 

And here's a diagram I have under the hood.

 

Huge help Fourtoad, the hose that Is under the red, next to the blue, the smaller one coming off the split, do you know where that goes. It’s making total sense to me. If I can see the other end of that I should be good. I actually have the blue hose connected there, so I need to move it over.

So Close !

 

Vacuum canister

 

Just can’t Thank you enough FT. Kept digging and finally found it. That is for the power steering valve, almost 4 months to get a complete picture. I don’t think my truck has one. Hope this may help,others.

No#5 and No#13 were the mystery for me, and consequently the ones left out of any pictures or videos that I could find.

 

With your help Fourtoad and finally finding that diagram I’m going to pull all of my stuff, replace any of the tiny hoses and finally get everything routed correctly.

Son of a biscuit I can’t believe I missed that Power steering valve, it’s hidden underneath everything so perfect. I replaced that about 6 months ago (power steering unit) and completely forgot that was there.

OPS & CRS .........isn’t it grand

 

I used Toyota OEM hoses on this engine simply because the lack of space and I knew they would fit and not get pinched.

 

bthp223,

Here is the procedure from the FSM to set the A/C idle rpm.

 

Thank you JTM, won’t get everything done till this coming weekend but I’ll be sure to run that test.