Jeep Cherokee 1990 AC Air Conditioner Problem
08-13-2012, 04:24 PM
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Model: Cherokee
Jeep Cherokee 1990 AC Air Conditioner Problem
I have this Jeep cherokee 1990 4WD V6 ,after i turn on the Air conditioner it will get cool after driving for about 10-15 minutes, the problem is the air blows only from defrost vents during acceleration , when I hit the brakes it will return back to Central vents , sometime the problem occures regardless if the car being driven or not, so is there a way to make the air go only to front vents, i mean fixing this spontanous blowing of air back and forth,
I'm sorry to be a noobie here,i could'nt the describe the problema better way, this is my first ever thread to be posted about a car issue.
I hope you could understand my problem.
any ideas will be appreciated ,thanks in advance
I'm sorry to be a noobie here,i could'nt the describe the problema better way, this is my first ever thread to be posted about a car issue.
I hope you could understand my problem.
any ideas will be appreciated ,thanks in advance
Last edited by Austin316; 08-15-2012 at 03:03 PM.
nd im a newbie too lol
08-13-2012, 05:20 PM
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I have this Jeep cherokee 1990 4WD V6 ,after i turn on the Air conditioner it will get cool after driving for about 10-15 minutes, the problem is the air goes by itself to the front part of the dashboard near the front window while driving , if the car stops the air will return to back to front seats , sometime the problem occures regardless if the car being driven or not, so is there a way to make the air go only to front seats , i mean bypassing this spontanous moving of air back and forth,
I'm sorry to be a noobie here,i could'nt the describe the problema better way, this is my first ever thread to be posted about a car issue.
I hope you could understand my problem.
any ideas will be appreciated ,thanks in advance
I'm sorry to be a noobie here,i could'nt the describe the problema better way, this is my first ever thread to be posted about a car issue.
I hope you could understand my problem.
any ideas will be appreciated ,thanks in advance
08-13-2012, 05:24 PM
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Sounds like check valve has crapped out in the ball i purchased a in line check valve cured my vent issues. As Cruiser stated check ball and line also...
Last edited by freegdr; 08-13-2012 at 05:26 PM.
08-14-2012, 11:49 AM
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here are some pictures of the ball i don't think there's anything wrong with it what do you think
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Last edited by Austin316; 08-14-2012 at 01:21 PM.
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08-15-2012, 03:08 PM
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when the engine running , and ac is on , i disconnected all hose which were attached to the vaccum reservoir , there is no air coming in or out from any line connecting to the reservoir , is it normal ?
how to check the vaccum lines if there is no air in it?
how to check the vaccum lines if there is no air in it?
08-15-2012, 03:32 PM
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
On your intake manifold, there is a fitting with a hose attached that runs to the rear of the engine bay, acroos the firewall to the passenger side, and along the passenger inner fender, behind the battery, to the vacuum ball. Start there.
08-17-2012, 10:30 AM
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the line was cut just behind the engine i did'nt find the other picece of the line , and now i do'nt know where exactly it goes to the intake manifold can you please guide me with more detail or put some pictures here , i searched for pictures ,could'nt find anything usefull
08-17-2012, 12:59 PM
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I think i found the Fitting you were talking about
it has a cap on it when i remove the cap while engine is running the sound of the engine becomes louder and air comes out of it , should i connect the line to it?
it has a cap on it when i remove the cap while engine is running the sound of the engine becomes louder and air comes out of it , should i connect the line to it?
Last edited by Austin316; 08-17-2012 at 01:02 PM.
08-17-2012, 02:20 PM
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
That's the one for the brake booster!!
08-17-2012, 03:27 PM
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I'd be more concerned at this point why your brake booster has no vacuum.
The fitting you're looking for is on top of the intake manifol, pointing straight up.
The fitting you're looking for is on top of the intake manifol, pointing straight up.