[BigOrange90YJ]

Rookie here, I am just trying to clean up all these vac hoses but im not completely sure how some of them need to be setup.

Where do I connect the PCV air in? (and should it always be steaming?)
(i do have the valve, i just took the picture without it)


Where does the PCV out connect? Do I have this correct?


Now for the CTO valve:
The valve with the angled connector (white) is going to the canister purge signal.

The "T" connect lines are going to the vacuum source below: ( I think it's called the EGR valve)

Last in the CTO valve is the one that i capped, I have no idea where this one needs to go. help?

What is this vacuum source need to control? I know it controls 4wd ( i just dont have it connected) what else needs to be hooked up to it?


I also do not have the vacuum advance connected either. Where does it tie in?

Lastly, what is this and do i need it?



Thank you for and and all help.



PS sorry for poor picture quality, they were all taken with my phone

[Spetsnaztico]

Originally Posted by BigOrange90YJ

Rookie hear, I am just trying to clean up all these vac hoses but im not completely sure how some of them need to be setup.

Where do I connect the PCV air in? (and should it always be steaming?)
(i do have the valve, i just took the picture without it)

Air Cleaner, but I think others run with just a filter on it.(anyone?)

Where does the PCV out connect? Do I have this correct?

Look on the back side of the carb for the PCV Connection. That is your vacuum for the advance.

Now for the CTO valve:
The valve with the angled connector (white) is going to the canister purge signal.

The "T" connect lines are going to the vacuum source below: ( I think it's called the EGR valve) these should tie into your vacuum advance.

Last in the CTO valve is the one that i capped, I have no idea where this one needs to go. help? This one goes on the EGR.

What is this vacuum source need to control? I know it controls 4wd ( i just dont have it connected) what else needs to be hooked up to it?

I only have this hooked to the 4wd.

I also do not have the vacuum advance connected either. Where does it tie in?

Lastly, what is this and do i need it?

Decel Valve. I don't have one so I'm not sure.


Thank you for and and all help.



PS sorry for poor picture quality, they were all taken with my phone

this might help. I have this setup but not with a Weber. (not my picture I'm not sure whose but they can have all the credit)

Try this website for help on all things vacuumTable of Contents

[BigOrange90YJ]

haha, yeah i def dont have it setup right then. I've been using that site, but its too stock for what my engine is turning into. its very hard to tell on these photoshop drawings where exactly specific lines attach

[Spetsnaztico]

So true. I just took a lot of time between the website provided and the drawings I found to figure out Where to hook it all up.

[BigOrange90YJ]

another question. Does ported vecuum mean the vacuum that increases with faster RPMs?

[raw_speed]

I went through this a while ago and I can tell your setup is definitely off a bit. I'm trying to find some pics of mine to show you... If I can't find them and you don't get other answers, I'll send you something tonight. I drove my other car today or I'd take some pics now...

What I can confirm is to just use an air cleaner on the back of the valve cover, and that you don't need the piece in the last pic anymore.

[monkeyhouse]

I'm not sure which model carburetor you have there, but I have an 89 YJ and put a Weber 38/38 DGES on it and this is in my instructions:
"It is not necessary to install a vacuum advance line to the carburetor on models after 1982. This is controlled by the manifold vacuum. Plug the vacuum advance port on the weber with the plug supplied with the kit."

I know what you mean about all the vacuum lines. I must have 20 diagrams and I still am not sure where everything goes, lol. Nice to know I can yank the decel valve though!

[BigOrange90YJ]

its a weber 32/36 dgev. And I'm really not sure which line is the vac advance port on the carb. Is the manifold vacuum the same vacuum that controls the power brakes in the 5th picture

[monkeyhouse]

Originally Posted by BigOrange90YJ

another question. Does ported vecuum mean the vacuum that increases with faster RPMs?

Yes, the way I understand it is a PORTED vacuum source as RPM increases, so does the vacuum to the port.

[monkeyhouse]

Originally Posted by BigOrange90YJ

its a weber 32/36 dgev. And I'm really not sure which line is the vac advance port on the carb. Is the manifold vacuum the same vacuum that controls the power brakes in the 5th picture

Okay, here's a pic of the 32/36, the vacuum advance port on that carb is right there under the choke on the right side.

advance.jpg picture by monkeyhouserodge - Photobucket

you should have a plug that came with your kit you can use to close it.

The manifold vac should be coming from a T with the PCV, but yeah, that port that is vacuum controlled for power breaks right under the egr vale is a manifold vac.

[monkeyhouse]

Originally Posted by BigOrange90YJ

its a weber 32/36 dgev. And I'm really not sure which line is the vac advance port on the carb. Is the manifold vacuum the same vacuum that controls the power brakes in the 5th picture

Hey, here are a few pics I found that might help you.

vacuum pictures by monkeyhouserodge - Photobucket

[BigOrange90YJ]

Originally Posted by monkeyhouse

Hey, here are a few pics I found that might help you.

vacuum pictures by monkeyhouserodge - Photobucket

I do not have the vac port at the base of the carb, as seen in this pic:
vacuum :: WeberVacuumHookup1.jpg picture by monkeyhouserodge - Photobucket

[BigOrange90YJ]

In this picture what is TVS? can i have the port on the CTO that is going to the TVS go directly to the EGR valve

[mcmud]

The Thermal Vacuum Switch. It allows passage of the vacuum signal when ambient temps allow. It can be mounted onto your new filter housing, if you desire.

"can i have the port on the CTO that is going to the TVS go directly to the EGR valve"
Yes you can allow the signal directly to the EGR, but I would recommend you set a Vacuum Delay Valve inline and just prior to the EGR.

It is a bit puzzling how you mounted the carb without the typical adapter plate...so common on the Weber. It would have a nipple to accept the vacuum line from the PVC. Until we can ascertain that no provision for the nipple is available you can 'T' into the canister purge line and adapt them onto the extra nipple at the manifold sharing with the brake booster. However that will bleed vacuum so in effect it is an air line and will somewhat reduce the signal to the Power Brakes.

Since you have a YJ the front axle vacuum line should be attached to the manifold threaded hole where the Decel Valve is now attached. As mentioned earlier in your thread it is no longer needed.

I have taken liberty and edited the diagram from the earlier post.

In your first image the line attached to the Air in should be connected to the air breather housing.

[mcmud]

------------