Brake issue! !!

, I bolted it up yesterday just need to bleed (again) it now after work too tired today maybe tomorrow I'll let you know.

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Also when I bought the brake pedal I didn't realize that they didn't have the spring in it or the brake pedal pad.had to take them off the other one and it was good ya something went right!

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Hmmm, that's strange, my brake pedal (1991 ABS) did not have a spring. Maybe when they built it they forgot to install it at the assembly line. Oh well, don't need it anyway with the upgrade.

Wow! 3 1/2 hours? And Oh man, you guys sure did a lot of extra work to install the brake pedal. I just reached up under the dash, took about 1 minute for the clip and about 5-6 minutes for the brake pedal nut and bolt and pedal out. Never touched dash, gauges or seat (just slid the seat all the way back). About 8-10 minutes to reinstall pedal all hooked back up. It's kind of cramped, but I've seen worse.

Oh wait, you guys removed and reinstalled the whole brake pedal and bracket assembly? Oh man, I just took out the pivot bolt for the brake pedal and removed the pedal only. Well it's all good, you now have spare parts if you need it. Lol
 
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Where did your vacuum hose for the booster connect? Here's my manifold. The only place I see is a capped off port near the throttle body.

94d473c57302945806cad9ec5c964388.jpg


dbe8d67041d1f0102735174f773823ce.jpg



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Okay great - the port was at a different location on the donor jeep where I pulled the booster. That port I posted an image of is the only vacuum port that I can see - I'll give it a shot :)


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LKN_xj said:
Where did your vacuum hose for the booster connect? Here's my manifold. The only place I see is a capped off port near the throttle body.

94d473c57302945806cad9ec5c964388.jpg


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Click to expand...

Actually it is at the extreme end of the manifold near the firewall and bearly visible in this picture next to the temperature sensor.
 
techno1154 said:
Actually it is at the extreme end of the manifold near the firewall and bearly visible in this picture next to the temperature sensor.
Click to expand...

That doesn't make any sense based on the hose routing and the pictures from the FSM. I'll have to check, but I think that one goes to the passenger side stuff and I don't think is big enough to handle that hose anyway.
 
Few more pics to aid discussion. I'm not seeing anything that remotely looks like it will accept that hose, other than the one right next to the throttle body.

cec1b7a8bb21c596afe8b766f44e23dc.jpg


98eb5b9dab0f5924475e859f154fd142.jpg



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dan1977p said:
Were those disconnected as part of the ABS removal? If so, what you're trying to connect to is in the trash. ;)
Click to expand...


Not sure I understand the question. The ABS wasn't a vacuum system, so nothing in the trash would have a connection for a vacuum hose. Also, I did keep everything in a tote.


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I may be getting all the brake threads mixed up. I thought you pulled your ABS to replace it with the vacuum system. If not, I don't know.

The big connector looks an aweful lot like the one of the TCU connectors but it's on the wrong side and doesn't look like it would reach.
 
dan1977p said:
I may be getting all the brake threads mixed up. I thought you pulled your ABS to replace it with the vacuum system. If not, I don't know.

The big connector looks an aweful lot like the one of the TCU connectors but it's on the wrong side and doesn't look like it would reach.
Click to expand...



You're correct in that we (OP and myself) pulled Bendix 9 ABS to replace with a vacuum system. I've had this jeep (in the family) since 1992, and am certain that plugged cap on the manifold us remained there with nothing attached for the Jeeps life. I assumed that Jeep would not make two manifolds for a booster/no booster setup if all they have to do is plug the booster setup, which led me to think that the plugged port is the spot where I need to plug into.

That, and I haven't read anywhere where an ABS delete required a manifold swap as well, and that there's no other port left on my manifold.

I guess what I'm saying is that the plugged port leads to the manifold, which pulls vacuum. Whether it's the "proper" connection or not, I'm not sure why it wouldn't work!


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Those manifold pictures are like nothing I have ever seen. Both the 1994 I used to have and the 1996 I have now have the hose from the booster bent into a U shape in order to connect to the booster and the manifold. Of course, none of them have anti lock brakes.
 
techno1154 said:
Those manifold pictures are like nothing I have ever seen. Both the 1994 I used to have and the 1996 I have now have the hose from the booster bent into a U shape in order to connect to the booster and the manifold. Of course, none of them have anti lock brakes.
Click to expand...



Is yours a HO 4.0?


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LKN_xj said:
You're correct in that we (OP and myself) pulled Bendix 9 ABS to replace with a vacuum system. I've had this jeep (in the family) since 1992, and am certain that plugged cap on the manifold us remained there with nothing attached for the Jeeps life. I assumed that Jeep would not make two manifolds for a booster/no booster setup if all they have to do is plug the booster setup, which led me to think that the plugged port is the spot where I need to plug into.

That, and I haven't read anywhere where an ABS delete required a manifold swap as well, and that there's no other port left on my manifold.

I guess what I'm saying is that the plugged port leads to the manifold, which pulls vacuum. Whether it's the "proper" connection or not, I'm not sure why it wouldn't work!


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Click to expand...

I guess I got confused. I thought you were asking about the wires since we'd already confirmed that capped vacuum port is absolutely the brake booster port. At least on my 91 HO intake.
 
dan1977p said:
I guess I got confused. I thought you were asking about the wires since we'd already confirmed that capped vacuum port is absolutely the brake booster port. At least on my 91 HO intake.
Click to expand...



No - I was asking for confirmation the capped vacuum port was where I connect the booster. There are no wires I'm concerned about - the only wires go to the proportioning valve and brake switch.

My concern stemmed from the fact that the manifold booster connection on the jeep at the junk yard that I pulled my booster from, was in a different location - more towards the firewall like you mentioned.

I think we are straight now :)


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