2000 Cherokee sport vacuum line question
#1
Newbie
Thread Starter
Join Date: Mar 2020
Location: Homer
Posts: 4
Received 0 Likes
on
0 Posts
Year: Alaska
Model: Cherokee (XJ)
Engine: 4L
2000 Cherokee sport 4.0L vacuum line question
I noticed an open vacuum port on the intake manifold (4L stock Cherokee) so looked for and found an unattached hose that seems to match. Unfortunately plugging in the hose immediately kills the engine. Plugging the vacuum port with my finger does the same thing. This seems odd to me as the engine seems to run fine with the port open and no check engine light.
Thanks for any direction on how to proceed from here. Pics below:
This is the open port:
Open port is a bit left of center
This is the hose I dug up that seems a likely match.
The free hose I found leads to the bottom line on this canister thing on the passenger side of the firewall
Thanks for any direction on how to proceed from here. Pics below:
This is the open port:
Open port is a bit left of center
This is the hose I dug up that seems a likely match.
The free hose I found leads to the bottom line on this canister thing on the passenger side of the firewall
Last edited by mralaska; 03-10-2020 at 11:02 AM. Reason: add engine size
#2
CF Veteran
Join Date: Oct 2015
Posts: 7,407
Likes: 0
Received 1,555 Likes
on
1,195 Posts
Year: 2000
Model: Cherokee (XJ)
That elbow looks like the right one to me.
The following users liked this post:
mralaska (03-12-2020)
#3
Seasoned Member
Join Date: Jul 2013
Location: PA
Posts: 487
Received 92 Likes
on
66 Posts
Year: 2000
Model: Cherokee
Engine: 4.0
On my 2000 it is connected to the manifold. I'm not sure why it would cause your engine to stall immediately, so I can't help there but you are correct that it should be connected.
The following users liked this post:
mralaska (03-12-2020)
#4
Old fart with a wrench
The fitting and hose feeds the canister purge solenoid and/or the leak detection pump. Have you connected the hose, then restarted the engine? I'm assuming the leak is being compensated for by the IAC valve and it can't react fast enough when you first plug it in.
The following users liked this post:
mralaska (03-12-2020)
#5
Newbie
Thread Starter
Join Date: Mar 2020
Location: Homer
Posts: 4
Received 0 Likes
on
0 Posts
Year: Alaska
Model: Cherokee (XJ)
Engine: 4L
Thanks! I was more concerned why the engine ran fine with the port open then faltered when I connected the hose but apparently that is normal behavior. I replaced the brittle plastic hose with regular vacuum line then started the jeep and it runs fine. Apparently a lot of jeeps have a plug over that port but some like mine have a leak detection pump connected to it and it is not uncommon to fall off. It should have thrown a code to trigger the check engine light but not gonna worry bout that
#6
Newbie
Thread Starter
Join Date: Mar 2020
Location: Homer
Posts: 4
Received 0 Likes
on
0 Posts
Year: Alaska
Model: Cherokee (XJ)
Engine: 4L
Last edited by mralaska; 03-12-2020 at 09:32 AM.
#7
CF Veteran
Join Date: Oct 2015
Posts: 7,407
Likes: 0
Received 1,555 Likes
on
1,195 Posts
Year: 2000
Model: Cherokee (XJ)
Thanks! I was more concerned why the engine ran fine with the port open then faltered when I connected the hose but apparently that is normal behavior. I replaced the brittle plastic hose with regular vacuum line then started the jeep and it runs fine. Apparently a lot of jeeps have a plug over that port but some like mine have a leak detection pump connected to it
Pretty sure all Jeeps have that with a vacuum line attached.
The same with the one nearest the firewall.
It is the one nearest the radiator that could have a hose or be capped.
Capped indicates you have '00 with Federal Emissions. If there is a hose attached to it means CA Emissions.
Trending Topics
#8
Newbie
Thread Starter
Join Date: Mar 2020
Location: Homer
Posts: 4
Received 0 Likes
on
0 Posts
Year: Alaska
Model: Cherokee (XJ)
Engine: 4L
Thinking you are wrong on that. That is is the middle nipple (port) right?
Pretty sure all Jeeps have that with a vacuum line attached.
The same with the one nearest the firewall.
It is the one nearest the radiator that could have a hose or be capped.
Capped indicates you have '00 with Federal Emissions. If there is a hose attached to it means CA Emissions.
Pretty sure all Jeeps have that with a vacuum line attached.
The same with the one nearest the firewall.
It is the one nearest the radiator that could have a hose or be capped.
Capped indicates you have '00 with Federal Emissions. If there is a hose attached to it means CA Emissions.
Thread
Thread Starter
Forum
Replies
Last Post
JerpCherooke
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
6
09-17-2017 10:31 PM
pwb
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
3
08-20-2011 06:15 PM
tuxfan212
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
04-11-2010 06:31 AM
mycherokee1989
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
02-01-2009 09:46 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)