231 T-case vacuume

[CWLONGSHOT]

In the four lines running to the T-case, is there any "jumpers" on these lines? What I mean is are they proprietary to the T-case or is there a "T" in there suppling vacuum to something else?

 

In looking for my "clunking noise" I took off the vacuum fitting to the T-case. I am running a POSI_LOK, and do not need the fitting or hoses. Then I had a thought, is vacuum in these lines used for anything else? like tranny? I believe the AW4 is computer controlled but does it still need/use vacuum, right?

I put the fitting back on. My idle was WAY LO!! I figured I must have a vac leak..right?? I checked as much as I could find/see. I found a red line behind the vac canister on the pass side fire wall. I discoed this and plugged the line. I now do not have any vac at the T-case. (I THOUGHT, I had done this months back when the POSI_LOK went in...my bad)

 

There are four lines leading into the T-case and three into the disco, the fourth is a red line for supply vacuum. These lines are still in place but none are connected. I would really like to remove all to clean things up. But wanted to ask to be sure they where not utilized for something else I cannot see. Any one know for sure???

 

At first the idle was the same, but gradually the idle came up and now purrs even better/smoother than before.

I THINK I am fine....time will tell.

 

Thanks again,

CW

[rejeep]

have you tried putting a cap on everything? or are you just letting the hang....

I can check on the aw4 in my garage and see of there is any vacume lines... I think its only electrical...

one of the lines to the vac motor t's into the engine so thats where the vac leak might be comming from... I knwo thats how it is on my YJ.. whne its off the idle loops a bit.

[87manche]

I've got an AW4 sitting in the garage. It's all electical, the only thing that looks remotely like a vac tube is the vent line. That trans has a 242 behind it, and the t-case doesn't have any vacuum lines.

[Bounty Hunter]

The vacuum lines to the transfer case operate nothing else. The 4 lines are:

• Vacuum from engine (often red)
  Vent line (often blue, with an odd shaped cap)
  2 lines to front axle (black)

There is a 5th line (on older models), it's the 3rd line at the disconnect and runs from the disconnect motor to the 4x4 light switch on the firewall (often yellow).

 

Trace the red line back to the intake manifold and remove the line, capping the port. All the other lines can be removed.

[CWLONGSHOT]

THANK YOU EVERYONE!!

 

I checked everything today. i re checked the idle and the lines. I forun the solinoid for the EGR was faulty as well as my TB was FILTHY!!!!

 

I cleaned the TB, discoed and plugged the feed line into the solinoid and the idle is beautiful!!! I have a box of small parts from the XJ I chopped up I believe I have one of these dohickeys...hopefully it will be working! :)

 

The idle is a tad high now...I'll adjust that after I replace the solinoid. In case it changes anything...

 

CW

[rejeep]

CW,

if you need anything motor related... I have a 88 parts XJ in the driveway... solonoids, valves, all that garbage is here.

 

Still have a complete motor to if anybody is interested ;) :brows:

[Bounty Hunter]

The idle is a tad high now...I'll adjust that after I replace the solinoid. In case it changes anything...

 

CW

I didn't think it's adjustable, it should come back down once your solvent burns out of the throttle body.

[CWLONGSHOT]

Thats kinda what I'm hoping for....man it ran aweful for a few minutes after the cleaning!! :eek: :D

 

If the rain holds off long enough this AM, I'll get back out there and finish.....

 

Thanks again for the help!!

 

RE, I just may need thet solinoid, if mine don't work!!

 

CW