It is currently Thu Mar 28, 2024 8:36 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 15 posts ] 
Author Message
 Post subject: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jun 13, 2016 1:04 pm 
Offline
LOST Newbie

Joined: Thu Apr 21, 2016 10:00 pm
Posts: 45
Would there be any check engine light if it is? I have 06 liberty crd btw. Thanks.


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jun 13, 2016 2:19 pm 
Offline
LOST Addict
User avatar

Joined: Thu Sep 06, 2007 9:51 pm
Posts: 6297
Location: Somewhere between Heaven and Hell... But it is really hot here on Earth...
Maybe. Depends on how failed it is. My personal feeling is they are never completely sealed anyway. The CRD should not smoke except at WOT, and if it does, you are leaking boost from somewhere.


Sent from my iPad using Tapatalk HD

_________________
Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 125 CRDs currently driving with my timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jun 13, 2016 2:48 pm 
Offline
Moderator
Moderator
User avatar

Joined: Sat Aug 24, 2013 11:36 pm
Posts: 7157
Location: Central GA
You can make a simple block off plate to ensure no leakby. Can be made out of most any lightweight metal such as steel or aluminum. Blocking it off will not set any DTC's (check engine light) as I ran this way for many months before the Weeks elbow kit became available... :wink:
Simply unbolt the exhaust tube on the EGR valve and slip the blockoff plate between the exhaust tube flange and EGR valve and bolt everything back up...

These are the dimensions:
Image

_________________
Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount

98 Dodge Cummins 24 Valve


Last edited by WWDiesel on Thu Apr 26, 2018 10:27 am, edited 2 times in total.

Top
 Profile  
 
 Post subject: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jun 13, 2016 4:37 pm 
Offline
LOST Addict
User avatar

Joined: Thu Sep 06, 2007 9:51 pm
Posts: 6297
Location: Somewhere between Heaven and Hell... But it is really hot here on Earth...
Did you have a green diesel tune? Because I am confused by the lack of a check engine light. The computer is looking for a drop in flow across the mass airflow sensor, when it commands the EGR to be open. If it does not see this change, then it will command the FCV to close. If it still does not see a drop in airflow across the mass there, then it will set the check engine light.

But the tune from GreenDiesel Engineering and some of the cheaper yeti tunes will eliminate the code from the computer.

_________________
Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 125 CRDs currently driving with my timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jun 13, 2016 6:46 pm 
Offline
LOST Newbie

Joined: Thu Apr 21, 2016 10:00 pm
Posts: 45
I don’t know if the EGR valve is stuck open or not. I am just trying to figure out if it is (or not) without taking things apart.


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jun 13, 2016 9:19 pm 
Offline
Moderator
Moderator
User avatar

Joined: Sat Aug 24, 2013 11:36 pm
Posts: 7157
Location: Central GA
m0sfet wrote:
I don’t know if the EGR valve is stuck open or not. I am just trying to figure out if it is (or not) without taking things apart.

If the EGR is stuck open and you are loosing boost, then you will see abnormal amounts of of black smoke bellowing out the tailpipe when trying to accelerate...it will be real evident.... :wink:

FYI: Geordi and all, I had my EGR blocked off with the block off plate way prior to any tune or other mods and never received any DTC's...

_________________
Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount

98 Dodge Cummins 24 Valve


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jun 13, 2016 9:23 pm 
Offline
LOST Addict

Joined: Fri Jun 22, 2007 11:43 am
Posts: 4962
Location: Green Cove Springs FL
The EGR valve is a lot like Schrödinger's cat.
Until you can observe it directly, it exists in both the open and closed state. The only way to know for sure which state it is is to open it up and see.

Now, if it were me and someone presented me with a box that may or may not have a dead cat inside, I'd just toss the whole thing in the trash and forget it ever existed. :wink:

_________________
U.S. Army Retired


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Tue Jun 14, 2016 2:54 pm 
Offline
LOST Newbie
User avatar

Joined: Mon Dec 08, 2014 12:24 pm
Posts: 46
Location: Costa Rica
Sometimes I had oscillating idle speed (hard to catch as the ECU would compensate to keep stable) and "less power" feeling when accelerating, never noticed black smoke... Jeep runs smoother after installing the EGR block off plate. :mrgreen:

_________________
2006 Cherokee(Export KJ), CRD, 4x4 Automatic.


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Tue Jun 14, 2016 6:48 pm 
Offline
LOST Addict

Joined: Sun Jun 07, 2009 5:10 pm
Posts: 1111
It is not magic here. P0401 is a stuck closed egr valve, P0402 is a stuck open egr valve. You can also check the air flow at idle with an OBD monitoring tool and that will also tell the tale. No real need to remove it to see the functionality if you can monitor the live data across the CAN bus.

_________________
Providers of wholly developed aftermarket solutions for the KJ CRD.
(248) 977 - 9531


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jan 01, 2018 8:05 pm 
Offline
LOST Newbie

Joined: Wed Dec 07, 2016 1:35 pm
Posts: 15
Location: Sisters, Oregon
My EGR valve is stuck open. Just found out. Got the P0492 code after installing new intake hoses. What can I do now? I need this to drive 20 miles to work and back each day as in tomorrow.


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jan 01, 2018 9:10 pm 
Offline
LOST Junkie
User avatar

Joined: Mon Jul 30, 2012 3:29 pm
Posts: 747
Time to delete!

_________________
SasquatchParts.com

Supporting Vendor

Jeep Liberty 2.8L CRD
Chevy Colorado/GMC Canyon 2.8L Duramax


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Mon Jan 01, 2018 10:12 pm 
Offline
LOST Addict

Joined: Fri Jun 22, 2007 11:43 am
Posts: 4962
Location: Green Cove Springs FL
Cowgirrl2 wrote:
My EGR valve is stuck open. Just found out. Got the P0492 code after installing new intake hoses. What can I do now? I need this to drive 20 miles to work and back each day as in tomorrow.

You can either replace the egr valve, delete the egr valve, or install a block off plate.

In the meantime, it’s still driveable. You might have some reduced power and black exhaust smoke, but you can still drive it.

_________________
U.S. Army Retired


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Tue Jan 02, 2018 12:40 am 
Offline
LOST Newbie

Joined: Wed Dec 07, 2016 1:35 pm
Posts: 15
Location: Sisters, Oregon
flash7210 wrote:
Cowgirrl2 wrote:
My EGR valve is stuck open. Just found out. Got the P0492 code after installing new intake hoses. What can I do now? I need this to drive 20 miles to work and back each day as in tomorrow.

You can either replace the egr valve, delete the egr valve, or install a block off plate.

In the meantime, it’s still driveable. You might have some reduced power and black exhaust smoke, but you can still drive it.


Thank you for the reply. Yeah, I've got the smoke goin'. But it helps a lot to know I'm not causing more problems. I've just put out $$$ for those hoses and was down to -$ for deposit on my own apt. (Perfect timing after the holidays, not.) Thank you, thank you!

P.S. That was Engine Code P0402. Sorry about the typo. Glad you could decipher what I meant.


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Tue Jan 02, 2018 8:12 am 
Offline
Moderator
Moderator
User avatar

Joined: Sat Aug 24, 2013 11:36 pm
Posts: 7157
Location: Central GA
Simple short term solution: install a block-off plate! 30 minute or less job with simple hand tools! :wink:
Here are the dimensions and instructions for making one and installation:> viewtopic.php?f=5&t=76576

_________________
Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited :JEEPIN:
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount

98 Dodge Cummins 24 Valve


Top
 Profile  
 
 Post subject: Re: Is there any way to tell if my EGR valve is stuck open?
PostPosted: Tue Jan 02, 2018 4:33 pm 
Offline
LOST Addict
User avatar

Joined: Thu Sep 06, 2007 9:51 pm
Posts: 6297
Location: Somewhere between Heaven and Hell... But it is really hot here on Earth...
If you have a few minutes and a cold canned beverage, you have a temporary block off plate already.

The domed bottom of the can is the perfect shape to fit within the EGR tube on the intake elbow. Don't cut it until after you get the marmon clamp off and can see the size - you want it to fit within the circle but not small enough to fall into the tube. Size should be about 1.25" across. Drop it into the end of the tube and reinstall back on the intake elbow.

_________________
Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 125 CRDs currently driving with my timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 15 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Baidu [Spider] and 35 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group. Color scheme by ColorizeIt!
Logo by pixeldecals.com