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Author Topic: Black box  (Read 2650 times)

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Offline GiS

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Black box
« on: September 29, 2006, 09:33:15 AM »
2002 TJ.

Removing the front fenders, on the passanger side there is a black box inside the fender (read: under the battery)...What does this do?

It has one line or hose running into it, I broke that off and heard a little "air" escaping...What does this box do besides get in my way?
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Offline Elsifer

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Re: Black box
« Reply #1 on: September 29, 2006, 11:52:53 AM »
Quote from: "GiS"
I broke that off and heard a little "air" escaping...


It's in your way now!

I think you are talking about the ac condenser? If you have air conditioning.
This link might help.
http://www.stu-offroad.com/body/ac/acleak-1.htm

Its under the battery tray.
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VA6CPL
Jeepless....

Offline GiS

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Black box
« Reply #2 on: September 29, 2006, 11:59:17 AM »
I dont have AC...Now I am really scared!  :lol:
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Offline Vinman

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Black box
« Reply #3 on: September 29, 2006, 12:10:40 PM »
It's a vacuum canister, you need it.
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Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
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Offline GiS

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Black box
« Reply #4 on: September 29, 2006, 12:31:29 PM »
Does it control the heater? Thats how you get that "psstt" when you change heater settings?
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Offline Vinman

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Black box
« Reply #5 on: September 29, 2006, 12:47:12 PM »
Quote from: "GiS"
Does it control the heater? Thats how you get that "psstt" when you change heater settings?


Yes and no, it holds vacuum so when the engine vacuum drops you still have reserve.

A typical symptom of a leaky vacuum canister is when you are accelerating and the engine vacuum drops, the heater control will change from floor or vent setting to the default defroster setting.

Vince
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Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
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Offline GiS

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Black box
« Reply #6 on: September 29, 2006, 02:25:29 PM »
Hrmm, time to get out the super glue and plasti-weld I guess  :shock:

Really wish I could just ditch it, I dont mind the heat going to my feet when accelerating??

Its just one more item I have to re-locate  :cry:
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Offline Jafar

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Black box
« Reply #7 on: September 29, 2006, 02:53:52 PM »
hmmm..thats what that is...i had to relocate it to put in my snorkel......
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Offline Vinman

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Black box
« Reply #8 on: September 29, 2006, 04:51:00 PM »
Quote from: "GiS"
Hrmm, time to get out the super glue and plasti-weld I guess  :shock:

Really wish I could just ditch it, I dont mind the heat going to my feet when accelerating??

Its just one more item I have to re-locate  :cry:


Close, the heat will redirect to the defroster when the system loses vacuum.  If you don't mind that, ditch it.

Vince
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/l ,[____],
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 ()_)-()_)-o-)_)

Quote from: Bnine link=topic=25904.msg162940#msg162940      date=1341881306
. 
 Resident prick is my job and it took me ten years to earn that title

SuicidalPenguin

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Black box
« Reply #9 on: September 30, 2006, 11:52:42 PM »
Quote from: "Vinman"

A typical symptom of a leaky vacuum canister is when you are accelerating and the engine vacuum drops, the heater control will change from floor or vent setting to the default defroster setting.

Vince


Is this the same on any Jeep (89 Comanche).  I've been wondering why I lose air coming through vents.  And is it just accelerating, because my floor and side vents just stop working on the highway and goes back to the defrost vents.
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Offline Domengus

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Re: Black box
« Reply #10 on: May 04, 2011, 05:26:47 PM »
hate to intrude on the thread but im installing a new front bumper and in order to do so i need to remove the vacuum canister, since this is my daily driver can i drive around town with it completely removed, or will it damage something
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Offline hps4evr

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Re: Black box
« Reply #11 on: May 04, 2011, 05:29:08 PM »
im guessing you searhced for this topic? thats an old one! if you leave it unhooked you'll have a vacuum hose unhooked and it wont like that, you could plug it i guess. or just move it to the fender and zip-tie it down.
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Offline Domengus

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Re: Black box
« Reply #12 on: May 04, 2011, 05:41:50 PM »
Thanks I was just basting cause this bumper might take two days
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Take me on your buggy take ta take me on your buggy, they be like dan, what, can you take me on your buggy, you know why cause everyone loves muddin',  and all I need is a lady to come up to me and you you and you be ready for some muddin'

Offline Immortal

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Re: Black box
« Reply #13 on: May 04, 2011, 05:49:31 PM »
Disconnect the "baseball" and put a screw in the end of the airline. The vacuum controls the vent settings, and cruise control. Ask me how I know.  ;) ;) :o
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Offline cLAY

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Re: Black box
« Reply #14 on: May 04, 2011, 07:30:05 PM »
On an older jeep that has a vacuum disconnect axle it keeps the front axle locked in when in 4wd. On my old '89 xj it had a cracked reservoir and I would lose 4wd when flooring it up an icy hill.

I relocated the reservoir to under the coolant pressure bottle. Fit nicely there, not sure why they didn't do that from the factory.
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