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small vac hose from passenger side firewall?

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Old 05-08-2010 | 06:55 PM
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ken72's Avatar
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From: Brentwood, TN
Year: 2001
Model: Cherokee
Engine: 4.0
Default small vac hose from passenger side firewall?

Any know what this is for. I will describe it as best as I can. It comes from the passenger side fire wall and is a small narrow vacuum type hose. It is connect to the firewall by a solid boot and moves up around the purge solenoid. It connects into the electrical taped wires that run along the top of the firewall. Any ideas? It was loose and I was wondering what it was connected to. Sorry I don't have any pictures but I am having a hard time finding any info.
Old 05-09-2010 | 01:04 AM
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ken72's Avatar
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From: Brentwood, TN
Year: 2001
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Engine: 4.0
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I will take pictures in the morning. I have searched and searched online and my Cherokee manual and found nothing
Old 11-06-2022 | 05:35 PM
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you ever figure this out? I snapped mine, whatever it is.
Old 11-06-2022 | 06:41 PM
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From: San Mateo, CA
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0 Renix, stock.
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Originally Posted by ken72
Any know what this is for. I will describe it as best as I can. It comes from the passenger side fire wall and is a small narrow vacuum type hose. It is connect to the firewall by a solid boot and moves up around the purge solenoid. It connects into the electrical taped wires that run along the top of the firewall. Any ideas? It was loose and I was wondering what it was connected to. Sorry I don't have any pictures but I am having a hard time finding any info.

Year model? Color of hose?

On my 1990 there are vacuum hoses there that operate the climate control system. There should be a kick panel covering these I believe.
Old 11-07-2022 | 08:55 AM
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From: San Antonio, Texas
Year: 1999
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Engine: 4.0L
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Originally Posted by 2000XJ2
you ever figure this out? I snapped mine, whatever it is.
He's had 12 years to do so!

It was probably the hose that leads to the cruise control (if equipped) and to the vacuum reservoir behind the front bumper trim.

Todd
Old 11-12-2022 | 07:40 PM
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From: syracuse ny
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
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Sounds like the very small vacuum line that controls the hvac blower mode on my zj..defrost, down, up, ..etc
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