Unsolved Problem w CRD Grand Cherokee - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > WK Grand Cherokee & XK Commander Forum > Unsolved Problem w CRD Grand Cherokee

All Bilstein shocks & struts - Lowest Prices Ever and Santa Kolak Announces: Kolak Exhaust 20% Off Sale!Introducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Reply
Unread 08-20-2014, 11:44 AM   #1
matt0135
Registered User
2008 WK 
 
Join Date: Aug 2014
Location: Woodbridge, ON
Posts: 3
Unsolved Problem w CRD Grand Cherokee

Hi there,

This is my first post on jeep forums and I'm looking for some help with my jeep. Its a 2008 Jeep Grand Cherokee Laredo with the CRD 3.0L Diesel Engine. Love this SUV to death and desperately need to solve this problem!

Description:

For about 2 weeks the engine has been acting up, I'll be driving at any speed (high or low RPM's, even when parked and idling) and the engine will sound like it jumps, the engine starts sounding rough and the temperature gauge starts to rise abnormally, even if the engine is cold. This will happen for a few minutes or seconds then stop. Very random and does not happen every time I drive the car, but malfunctions at least once per day. I don't necessarily loose power when it happens but I worry about the engine overheating and nothing I've done seems to fix it.

The computer told us to change the EGR valve and Coolant temperature sensor. Still the same problem. We also replaced the fuel filter, air filter, and oil filter.

The computer no longer shows any fault codes, except for 4 glow plugs which need replacement. I do not think this is relevant to the problem since they've needed replacement for a year now and will be replaced today.

Anyone experience the same problem with their Jeep and have a potential solution for me?

Thanks for you time!

matt0135 is offline   Reply With Quote Quick reply to this message
Unread 08-20-2014, 11:51 AM   #2
BAH101
Registered User
2008 WK 
 
Join Date: Jan 2009
Location: Thunder Bay, Ontario
Posts: 777
You said the temp begins to rise, does it go back down once the 'roughness' ends?
Do you have a way to check your voltage? Maybe check when it happens, maybe the alternator is screwing up, or seizing, causing your belt to slip. That might cause the water pump to slow, or stop causing your temps to increase during the session.
__________________
2008 CRD QDII, OME HD, Pintlers wheels with 265/70/17 Goodyear Silent Armour's, Jeepinbyal UCA's. 4XGuard Front guard, Side Guard, belly guard, Matrix HC. GDE ECO Tune w/ delete.
BAH101 is offline   Reply With Quote Quick reply to this message
Unread 08-20-2014, 11:58 AM   #3
matt0135
Registered User
2008 WK 
 
Join Date: Aug 2014
Location: Woodbridge, ON
Posts: 3
Quote:
Originally Posted by BAH101 View Post
You said the temp begins to rise, does it go back down once the 'roughness' ends?
Do you have a way to check your voltage? Maybe check when it happens, maybe the alternator is screwing up, or seizing, causing your belt to slip. That might cause the water pump to slow, or stop causing your temps to increase during the session.
Hi,

Yes the temps go back to normal when the roughness ends. I wish I could describe it better. It sounds like it could be miss firing but that's just a shot in the dark.

Im sure I have a way to measure voltage at the shop but 9/10 the issue happens when driving the vehicle. Only once did it do this during idle. I'll give it a try though thanks!
matt0135 is offline   Reply With Quote Quick reply to this message
Unread 08-20-2014, 12:14 PM   #4
TangoTango
Registered User
2008 WK 
 
Join Date: Oct 2011
Posts: 1,321
Hook up a good scanner to it while driving and see what is going on. (you may need to get the dealer to do this). I had a similar problem on another diesel and what was happening was the PCM thought the car was going 135mph and would limit switch-off the engine. Was a bad wire in the harness.
TangoTango is offline   Reply With Quote Quick reply to this message
Unread 08-20-2014, 03:25 PM   #5
BAH101
Registered User
2008 WK 
 
Join Date: Jan 2009
Location: Thunder Bay, Ontario
Posts: 777
Quote:
Originally Posted by matt0135
Hi, Yes the temps go back to normal when the roughness ends. I wish I could describe it better. It sounds like it could be miss firing but that's just a shot in the dark. Im sure I have a way to measure voltage at the shop but 9/10 the issue happens when driving the vehicle. Only once did it do this during idle. I'll give it a try though thanks!
You could pull your serpentine belt and check for roughness in the water pump, alternator, idler wheel and belt tensioner.
__________________
2008 CRD QDII, OME HD, Pintlers wheels with 265/70/17 Goodyear Silent Armour's, Jeepinbyal UCA's. 4XGuard Front guard, Side Guard, belly guard, Matrix HC. GDE ECO Tune w/ delete.
BAH101 is offline   Reply With Quote Quick reply to this message
Unread 08-20-2014, 05:11 PM   #6
Chirpz
Senior Member
 
Chirpz's Avatar
2007 WK 
 
Join Date: Aug 2009
Location: Battle Ground, Washington
Posts: 928
Quote:
Originally Posted by BAH101 View Post
You could pull your serpentine belt and check for roughness in the water pump, alternator, idler wheel and belt tensioner.
This sound like a good thing to check. I was going to ask.... How many miles is on the Jeep and How old is the belt?
__________________
Chirpz
2007 WK 3.0L CRD, Quadradrive II, GDE EcoTune, DPF-Delete
4xGuard Front, Rear, Belly, & Side Rails, Factory Skids
EHM MOD, Garmin Mechanic EcoHD, K&N Filter (Deleted)
Chirpz is offline   Reply With Quote Quick reply to this message
Unread 08-20-2014, 09:16 PM   #7
tnadanzig
Senior Member
 
tnadanzig's Avatar
2007 WK 
 
Join Date: Oct 2011
Location: Iowa City, Iowa
Posts: 596
I would agree with checking the serpentine belt and pulleys. You could also have a problem with your thermostat. I would also check your injection system. Does the rail pressure fluctuate when this happens? If you have any kind of OBD 2 monitor you can see if some basic systems are giving you a problem. Does the boost pressure change as well?
__________________
CB Engineering
CB-engineer.com
2008 3.0L CRD WK LTD - Wifes, GDE DPF Delete Tune, Turbo Resonator Delete, 3" Intercooler, Addcoo Rear Sway Bar, 3.07 gears
2007 3.0L CRD WK LTD - Stage 2 Custom Spooling Tune, Go Fast Parts
Pro-lite Build
2003 F250 6.0L CCLB - Gearhead Tunes
tnadanzig is offline   Reply With Quote Quick reply to this message
Unread 08-20-2014, 09:18 PM   #8
ttusqrl
Member
2005 WK 
 
Join Date: Oct 2007
Location: Dallas, TX
Posts: 467
Air in the cooling system can cause the temperature flux as well.
__________________
2005 WK 5.7 ORT | Mod SL (OME struts & 990s) | JBA UCAs & Discos | Saguaro Front Bumper | Warn Zeon 10s | 285/70/17 BFG TA KO | AIRAID CAI | Gibson 3" Exhaust | DiabloSport Intune | JL Stealthbox
ttusqrl is offline   Reply With Quote Quick reply to this message
Unread 11-18-2014, 09:45 PM   #9
ggrassmid
Registered User
 
Join Date: Apr 2014
Location: Grand Rapids, Michigan
Posts: 107
Quote:
Originally Posted by tnadanzig View Post
I would agree with checking the serpentine belt and pulleys. You could also have a problem with your thermostat. I would also check your injection system. Does the rail pressure fluctuate when this happens? If you have any kind of OBD 2 monitor you can see if some basic systems are giving you a problem. Does the boost pressure change as well?
Chirpz or Tnadanzig; do you have any step-by-steps on replacing the t-stat? I think mine is acting up. I am now noticing it because we are getting cold weather and snow. When driving, usually slow, the temp gauge and dashboss scanner show the CRD up to temp (180-190*), but heater blows cold air. Then all of a sudden the temp climbs to 220* for a minute or so, drops back down fairly quick, and I have nice hot air for a while. Sometimes, depending on how slow-ish I'm driving (city), it has happened a couple different times. Makes warming up jeep and having a nice warm jeep to get into after brushing her off a little harder. A similar thing happened on my Corvette and I ended up replacing t-stat.
ggrassmid is offline   Reply With Quote Quick reply to this message
Unread 11-19-2014, 01:25 AM   #10
Chirpz
Senior Member
 
Chirpz's Avatar
2007 WK 
 
Join Date: Aug 2009
Location: Battle Ground, Washington
Posts: 928
Sorry, I do not.
__________________
Chirpz
2007 WK 3.0L CRD, Quadradrive II, GDE EcoTune, DPF-Delete
4xGuard Front, Rear, Belly, & Side Rails, Factory Skids
EHM MOD, Garmin Mechanic EcoHD, K&N Filter (Deleted)
Chirpz is offline   Reply With Quote Quick reply to this message
Unread 11-19-2014, 02:51 AM   #11
TangoTango
Registered User
2008 WK 
 
Join Date: Oct 2011
Posts: 1,321
the t-stat is just 3 bolts, a no-brainer. what you do need to do is be very very careful of the black rubber fuel return line that goes over the t-stat. You must first remove the clip on the end of the fuel return line to the right-driver side then very carefully remove the 90-degree plastic elbow. carefully because if you break the 90 degree plastic you need to replace the whole return fuel line. some guys cut the line, in which case you need the special brass fitting to re-attach the cut line back together. i may have some extras brass fittings which are very hard to find. if you cut the line make sure you cut it on the left side of the t-stat. the t-stat is about $65 plus tax plus ship runs about $90. it also takes a special fluid, best place for that fluid is amazon at $30 a case. when re-filling top off the engine before replacing the t-stat to avoid air.
__________________
Black WK Club #147
TangoTango is offline   Reply With Quote Quick reply to this message
Unread 11-21-2014, 07:06 PM   #12
ggrassmid
Registered User
 
Join Date: Apr 2014
Location: Grand Rapids, Michigan
Posts: 107
Thanks. I will take a look.
Special coolant fluid? Is there a difference? If its green, continue using green; likewise with orange. I didn't know there was anything different.
ggrassmid is offline   Reply With Quote Quick reply to this message
Unread 11-21-2014, 08:12 PM   #13
TangoTango
Registered User
2008 WK 
 
Join Date: Oct 2011
Posts: 1,321
yes special coolant fluid on the CRD should be zerex g-05 or mopar or merc.
__________________
Black WK Club #147
TangoTango is offline   Reply With Quote Quick reply to this message
Unread 11-21-2014, 08:53 PM   #14
ggrassmid
Registered User
 
Join Date: Apr 2014
Location: Grand Rapids, Michigan
Posts: 107
I would need to use any ethylene-glycol type coolant (plus distilled/RO water). Doesn't necessarily have to be Mopar stuff.
ggrassmid is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.