What the heck just happened - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > 2014+ Jeep Grand Cherokee Ecodiesel 3.0

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 11-22-2015, 04:35 PM
wireman's Avatar
Member
 
Join Date: Nov 2015
Posts: 113
Thanks: 0
Thanked 18 Times in 12 Posts
Rep Power: 14780
wireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond repute
Garage
What the heck just happened

I had a strange situation happen a couple of days ago. First a little back round on my JGC. It's a 2015 limited, 4WD, 3.0 Eco diesel. I bought it out of state and drove it back home the 2nd week of Oct. Put on about 700 miles. No issues.
On Friday I was on the freeway driving back home, late evening, flat road, about 70mph. All of a sudden I heard what sounded like a loud explosion (boom) from the rear of the vehicle. Sounded like a tire exploding. Really loud.

The next morning I checked under the vehicle, no sign of damage underneath. I'm sure I didn't run over anything. No signs of impact under the vehicle or on the body. Nothing out of place under the hood.It drives fine with no sign of problems.
The dealer filled the DEF tank B4 I left and since then I've driven about 1000 miles. The DEF gauge still shows 100% full. I would think the level should have gone down after the amount of mileage I've driven.

I'm wondering if this could have been caused by the DEF or regenerative system even though the DID has not shown any process needed or taking place. The majority of my miles , 80% or so have been highway miles.

I'm going to make an appt. with the dealer for some other minor issues and am going to mention this episode.

Give me some idea's of what you think it could have been. Has anyone had this happen? Thanks Wireman

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 11-22-2015, 04:42 PM
Member
 
Join Date: Sep 2010
Posts: 44
Thanks: 3
Thanked 9 Times in 6 Posts
Rep Power: 2305
ErniesWK2 is on a distinguished road
Re: What the heck just happened

Did it sound like it came from your speakers? I have heard of previous mentioning of static like popping intermittently coming from the sound system.
Reply With Quote
  #3  
Old 11-22-2015, 04:49 PM
Member
My Jeep: 2012 WK2
 
Join Date: Mar 2012
Posts: 924
Thanks: 37
Thanked 43 Times in 39 Posts
Rep Power: 1232648
2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute
Re: What the heck just happened

DEF gauge showing full at 1K miles is not out of the ordinary.
Reply With Quote
  #4  
Old 11-22-2015, 06:11 PM
wireman's Avatar
Member
 
Join Date: Nov 2015
Posts: 113
Thanks: 0
Thanked 18 Times in 12 Posts
Rep Power: 14780
wireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond repute
Garage
Re: What the heck just happened

No, not from the speakers. Definately in the rear, underneath the vehicle.
Reply With Quote
  #5  
Old 11-22-2015, 10:25 PM
Barboots's Avatar
Senior Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2013
Location: Perth, Western Australia
Posts: 2,370
Thanks: 129
Thanked 328 Times in 281 Posts
Rep Power: 10599
Barboots has disabled reputation
Re: What the heck just happened

Maybe something on the road you didn't see flipped up and banged on the floorpan?
__________________
2014 Overland CRD
Perth, Western Australia
Reply With Quote
  #6  
Old 11-22-2015, 10:32 PM
Member
 
Join Date: Apr 2012
Posts: 697
Thanks: 144
Thanked 81 Times in 73 Posts
Rep Power: 7905
XKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond repute
Re: What the heck just happened

DEF gauge will maintain 100% until you get about 1100 miles on the car, then you will start seeing a graduated increase in consumption. Make sure you're looking at the scrolling line below the gauge. Depending on your driving characteristics, you will average 1 gallon per 8 to 1100 miles.


Sent from NSA Surveillance Van #574
Reply With Quote
  #7  
Old 11-23-2015, 12:10 AM
Senior Member
 
Join Date: Sep 2013
Posts: 1,287
Thanks: 46
Thanked 155 Times in 126 Posts
Rep Power: 2808
Roadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond reputeRoadkill has a reputation beyond repute
Quote:
Originally Posted by wireman View Post
The DEF gauge still shows 100% full. I would think the level should have gone down after the amount of mileage I've driven.
Are you certain you're reading the gauge correctly? The UI geniuses at FCA thought it would be clever & exciting to replace the expected "F" on the DEF gauge with "100%".

That is to say the 100% on that screen never changes, even if the tank is empty. It merely indicates the "Full" end of the gauge. It's the indicator bar that moves right to left as DEF is consumed.

Also, the DEF level is based on a crappy ultrasonic sensor in the tank, which is so imprecise that they "smooth" its readings to avoid having it fluctuate wildly. This is why you must always add at least 1 gallon of DEF at a time. If you don't add at least that much the algorithm will presume the ultrasonic gauge is smoking crack again and will suppress the updated fill level readings.
Reply With Quote
  #8  
Old 11-23-2015, 10:51 AM
wireman's Avatar
Member
 
Join Date: Nov 2015
Posts: 113
Thanks: 0
Thanked 18 Times in 12 Posts
Rep Power: 14780
wireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond reputewireman has a reputation beyond repute
Garage
Re: What the heck just happened

Thanks for pointing out the way the DEF gauge works. The graduated line has moved down slightly from the 100% mark. I'm expecting the 100% visual display to change. Definitely a learning curve on how things work.

I crawled under the jeep yesterday and looked over every inch of the underbody and could not find any indication of something hitting it. I had my eyes on the road and did not see anything B4 the loud noise, which sounded more like an explosion than a thump of something hitting below.

I'm posting a thread from another forum of the same type of incident. Unfortunately there is no resolution to his problem posted.
Can a diesel back fire or does the 2014 need a turbo waste gate? | Diesel Jeep Forum

If I'm understanding correctly the DEF fluid gets injected into the exhaust system. Would it be possible that a large amount of fluid was injected at 1 time, causing this large bang.
This vehicle sat on the dealers lot for 4 months making me wonder if the DEF line may have been plugged from sitting.
.
Just throwing stuff out there for 2nd opinions. Thanks. Wireman
Reply With Quote
  #9  
Old 11-23-2015, 11:23 AM
Member
 
Join Date: Apr 2012
Posts: 697
Thanks: 144
Thanked 81 Times in 73 Posts
Rep Power: 7905
XKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond reputeXKTrail has a reputation beyond repute
Re: What the heck just happened

Quote:
Originally Posted by wireman;

[B
If I'm understanding correctly the DEF fluid gets injected into the exhaust system. Would it be possible that a large amount of fluid was injected at 1 time, causing this large bang. [/[/B]

White it's plausible, the DEF fluid is a only a reactant with the exhaust gases; it is a non-combustible fluid.


Sent from NSA Surveillance Van #574
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
what the heck happened? akimball Site News, Help, and Feedback 26 07-24-2013 11:44 PM
The Heck makes a WJ shutoff while driving? cherokee_dude Engine Performance/Intake/Exhaust 20 06-02-2011 10:54 AM
What the heck, new Jeep compass has LED tail lights?!? JTS97Z28 Grand Cherokee - WK2 - 21 01-30-2011 10:43 PM
OK what the heck people? NHWK05 Members Rides 3 09-14-2010 01:08 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:07 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.