1983 vacuum lines

[daryl2cb]

So I have been working on my new purchase of a wagoneer limited 1983. I have a build thread out there and will be updating progress. On to my question, I searched for vac lines and the forum brought up 1500 plus results, I have a diagram on my core support, and I am aware of the tech guides, however this car is before my time, and while I can Id things like the air pump and erg, vac can, I am getting lost with other items on this list to make sure I had the correct things in the right area. The vehicle had many things plugged off or loose so I am trying to get my high idle down and address the leaks. Can anyone point me to a visual (with actual photos) of some of these specific parts, like tac signal for instance? Or is the a definitive guide on these lines on the forum somewhere out side of the black and white diagram? Thanks in advance.

[tgreese]

Sorry, the TSM is the best authority for the vacuum lines and emissions components. If you have no background, it will be work to do the reading and research needed to understand these systems and their parts. Pretty much the price of admission, from my POV. TAC is thermostatic air cleaner, defined in both the emissions devices table and in the emissions chapter of the '82-83 TSM. A signal in this context is a vacuum signal, that is, the operational input (power, information) provided by a vacuum connection. Please ask specific questions, as needed.

The '83 TSM is a supplement to the '82 TSM. It's available as bound paper or on digital media several places. Not expensive.

TSM.png

Dr. Bob spent a lot of time and effort making some videos about the Wagoneer emissions systems. https://www.youtube.com/@bbsbcv/videos? ... shelf_id=0 Not my cup of tea, but maybe helpful to you. Likely there's no video specifically for '83, but may be educational about general principles of these systems. Note that the emissions systems change from year to year, especially in the '70s and '80s. You need to use the references that are meant for your year, model and equipment.

[daryl2cb]

I understand what you mean, I watched his carb video and I think I was done with it back on the car before it was over. I did found where the ball bearing went which was what I was looking for so it did help.

I also didn’t realize the tsm had three sections combing through the appropriate one now. I made some head way and got the Jeep running and was able to drive in a circle and get it back in the shop nose first so I can actually see what I am doing. It was tail first as that’s how it rolled off the trailer.

I am going to be digging up some specifics and a few components and questions on testing them. So far I got the temp gauge and fuel gauge working as I found a wire off during the vacuum line hunt.

The previous owner put dual exhaust on this jeep, I am wondering if that would be leaning me out at all as when a wack the gas I get some cracking out of the exhaust. Would I need to upsize the jets for this modification?

[letank]

a good video about the vac lines

viewtopic.php?t=18652

best

[seventynine]

Popping in the exhaust usually means the mixture is too rich…not lean.

[daryl2cb]

Ok if it’s likely rich, I am guessing it’s a choke issue potentially or the door in the tac didn’t open as it wasn’t up to operating temperature. Still babying this thing around as I haven’t gone through everything yet and oil change it up on the list and amp meter bypass.

[tgreese]

Do you still have an air pump / air injection / smog pump ("Air Guard")? That has an "exhaust emission backfire valve" that needs a manifold vacuum connection. When the throttle closes, the mixture goes momentarily dead rich. The anti-backfire valve senses the vacuum change, and closes to block air injection and prevent a backfire. These valves are sometimes called "burp valves" since they prevent the pop-pop-pop when the hydrocarbon-rich hot exhaust gas is blasted with extra air from the smog pump.

Engine warms up and you can inspect the choke flap and air cleaner flaps. Or force them to be open and see if anything changes. The air cleaner has one flap for the hot air pipe and another to contain the float bowl vapors when the engine is shut off.