[1266]

I'm the 432nd owner of an 83 CJ-7 with 258, w/ carter BBD, without the comp. on the back of the carb.

I'm trying to figure out the routing of the hose from my CTO swicth...

Right now, I've got EVERY port on my CTO plugged. I believe that most of the vaccuum and EGR controls have been disposed of by the last owner.

Looking in the engine bay, I can't find most of the required pieces.(TVS, chk vlvs., acel/decel sol., etc.)

All I've got is my canister(w/ the 4 hoses), CTO switch, and EGR(which may not be working)



Here is an attempted diagram....

____________Intake Manifold_______________
.
..
.. <CTO Switch


Let's call the CTO ports: 1
2 3
4 5

What is the bare minimum of vaccuum hoses required to run properly and efficiantly?

Thanks for reading,

Tim

 

[803]

This may help

 

[1266]

I've got that diagram in my Chilton's manual, which I've been trying to decipher...Becauce I've got a limited amount of vaccuum related parts under my hood.

From that diagram....Is there anyway I can find what I NEED to have hooked up?

Also, Where would I be able to find my TVS switch? It seems to be hiding.

On the diagram, what is the part marked "M", just under the EGR valve?

Thanks,

Tim

 

[WILL]

In reply to:

On the diagram, what is the part marked "M", just under the EGR valve?

[/ QUOTE ]

Manifold vacuum source.

 

[2450]

The TVS switch will be on the stock air cleaner...there are 2 small ports sticking out the side of it...the unit that plugs into it is a double-barreled, 1 piece rubber/plastic piece which would have 2 small bore vacuum lines running to it, though it sounds like you probably don't have this anymore...do you still have the stock air cleaner?

 

[1266]

I no longer have the stock air cleaner, as I am the 432nd owner of this rig...I've got no idea who did what with what.

As of right now, I've only got my PCV valve/hoses and my dist. advance hooked up.

all ports on my CTO switch are plugged.
Is this a problem?
My engine seems to run relativly fine now, she's got a hard time getting going in the mornings when it's really cold.

Would hooking up all of those plugged CTO ports improve the overall driveability and performance of my engine?
Or is it only needed for emissions law?

Thanks,

Tim

 

[texas1al]

First off, your Jeep will probably never run well when first started on a cold morning, so don't use that as your measure of success. The "M" is the port on the intake you asked about in your other post. In the diagram above it's different, but in factory diagrams or on your underhood sticker, you'll probably see a line running from the "M" to your distributor advance. Ported vacuum works too.

The CTO is important for opening/closing the EGR valve and if the EGR is not working, that will affect engine performance. Since you don't care about emissions, you could probably remove the EGR entirely. In the diagram above, you can see the TVS on the back of the air cleaner - it has a line coming from the CTO and one going to the EGR valve. I would guess that since you don't have a stock aircleaner anyway, you should just bypass the TVS anyway and run a line directly to the EGR from the CTO - its only function in life is to open (or is it close?) once a certain air temperature is reached inside the air cleaner.

 

[WILL]

In reply to:

The "M" is the port on the intake you asked about in your other post. In the diagram above it's different, but in factory diagrams or on your underhood sticker, you'll probably see a line running from the "M" to your distributor advance. Ported vacuum works too.

[/ QUOTE ]

Ported vacuum doesn't work. You want manifold vacuum to the EGR and purge port on the vapor canister not ported vacuum.

 

[texas1al]

I meant ported vacuum works for the distributor advance, even though manifold vac was used from the factory.

 

[1266]

Thanks for that clear explanation Texas1al...I'm not gonna worry about my CTO/EGR issues for now...as SC has no emssions laws and now that I know it won't affect performance.

I'm gonna try to hook up my dist. advance to the mainfold vac. tommorrow. I'll let you know how she runs.

Thanks,

Tim