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  #12709  
Old 01-08-2015, 11:32 PM
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Re: 2014 Grand Cherokee information - Australia

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Jesus.
He might be the only one who knows WTF is up with these DPFs!

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  #12710  
Old 01-08-2015, 11:43 PM
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Re: 2014 Grand Cherokee information - Australia

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He might be the only one who knows WTF is up with these DPFs!

Ha, probably. Man I remember a few going on about it but in the past I managed to get to a decent stretch of road for the message to disappear. This time I wasn't so fortunate and wondered WTF was happening when it just dropped into 3rd with my foot pressed to the metal.
Glad it didn't happen during the storms with heavy traffic...mind you I would probably get a new rear door :faceslap:


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  #12711  
Old 01-08-2015, 11:58 PM
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Re: 2014 Grand Cherokee information - Australia

See this is what worries me... I've never seen any message in either of my WK2s. So am I getting by just on passive regeneration? I best just go and ask the expert at the dealership, because he'll surely know.
:what:
The whole deployment of the DPF system is utter shit. No gauge. No consistency of regen occurrence reporting in EVIC. No manual burn. Unavailability of DPF status via OBD. No warning before limp and so on...

Anyway... sympathies for you guys who had your holidays spoilt by this ongoing circus of third rate engineering and fault rectification ineptitude.
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  #12712  
Old 01-09-2015, 12:22 AM
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Re: 2014 Grand Cherokee information - Australia

Just booked it into another dealership 100km away as he confirmed there is a software update that he can install.


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  #12713  
Old 01-09-2015, 12:29 AM
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Re: 2014 Grand Cherokee information - Australia

If anyone gets into trouble with theirs around the WideBay area then I can so far only say good things about Bundaberg Prestige dealership. So far they've updated the engine rattle in relation to the injectors, improved the radio and now hopefully the DPF on top of being polite, easy to deal with and even little things like putting paper seat covers on and respecting your car.




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  #12714  
Old 01-09-2015, 12:43 AM
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Re: 2014 Grand Cherokee information - Australia

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Originally Posted by Dallas View Post
Just booked it into another dealership 100km away as he confirmed there is a software update that he can install.


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Good stuff, seems you have to hunt around when you need stuff done to your jeep...
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  #12715  
Old 01-09-2015, 12:43 AM
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Re: 2014 Grand Cherokee information - Australia

Sounds like they could lose their franchise
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  #12716  
Old 01-09-2015, 01:23 AM
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Re: 2014 Grand Cherokee information - Australia

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Oh lord..... you have a 3l export diesel, and you have had the MIL DPF full error, so it does apply to your car. I'd try someone else....

The problem remains that if you are doing highway driving the the dpf should be regenerating before it gets to the point of being totally full. If it isn't operating properly then, it isn't going to on the side of the road in N revving the guts out of it. And I'm pretty certain it won't regen while stationary anyway. The heat off the bottom of the car is huge, which is why they want the car in motion during a regen.
Oh yeah I agree definitely, if the system is doing an active regen (with the message on the EVIC) then it is injecting fuel into the system during the exhaust stroke , effectively straight in the the DPF to heat up the system to burn the soot off. It'll get up to 600-700C instead of the normal highway driving temps of around 300-350 or so.

I'd definitely want to have cooling airflow with the car moving during that process. Maybe that's really why they say you have to drive at highway speeds.

350C is supposedly OK to burn off the soot in normal operation and keep it clear so it wont need to do the "active" regen (with the EVIC message)

I don't know what the service guys at Jeep to after "forcing" a regen with the software. Drive it? Run a big fan in front of it? or just let it cook?

I've heard somewhere that Mercedes is now disabling the software forced regen in some of their models. Maybe its for safety reasons or maybe its to charge more customers for new DPFs IDK.
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  #12717  
Old 01-09-2015, 01:54 AM
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Re: 2014 Grand Cherokee information - Australia

Quote:
Originally Posted by Barboots View Post
See this is what worries me... I've never seen any message in either of my WK2s. So am I getting by just on passive regeneration? I best just go and ask the expert at the dealership, because he'll surely know.
:what:
The whole deployment of the DPF system is utter shit. No gauge. No consistency of regen occurrence reporting in EVIC. No manual burn. Unavailability of DPF status via OBD. No warning before limp and so on...

Anyway... sympathies for you guys who had your holidays spoilt by this ongoing circus of third rate engineering and fault rectification ineptitude.
Steve,

Since in WA everything seems to be so far apart (eg shall we go to the wineries this Saturday morning? Sure, it's just a casual 300km away!) then maybe all your driving is fine to keep it clear.

If they had an exhaust temp sensor (display) that would be handy.

300-350 C on the highway will supposedly keep it clear.
idling around town it'll only be 150-200 so won't be hot enough to burn the soot.
The DPF active regen would take it up to a roasting 600 or 700C. The DPF is pretty much right under the driver's feet so I hope the heat shielding is decent


What I found odd was the instances of it saying it's XX% full and then immediately going into limp mode. If that is a software error and the filter is not actually severely blocked enough to warrant going into limp mode then the update RRT 14-104 (or 18-019-14A) will cure that issue surely.

Plenty of people have had DPF regen sequences run through sucsessfully and be completed, so the process itself seems to work providing it doesn't go to limp mode first.


I drive 6km to work and 6km back 5 days a week so I'll use the DPF as an excuse to go for a blast in the National Park on the weekend.
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  #12718  
Old 01-09-2015, 02:30 AM
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Re: 2014 Grand Cherokee information - Australia

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Originally Posted by Steve1307 View Post
I'd definitely want to have cooling airflow with the car moving during that process. Maybe that's really why they say you have to drive at highway speeds.
You wouldn't want to be parked on a dry grass shoulder near farm or bush land during bushfire season.....
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  #12719  
Old 01-09-2015, 07:17 PM
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Re: 2014 Grand Cherokee information - Australia

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You wouldn't want to be parked on a dry grass shoulder near farm or bush land during bushfire season.....

Try to explain that one away when you start a major bushfire just by pulling over onto the verge!


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  #12720  
Old 01-10-2015, 06:39 AM
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Re: 2014 Grand Cherokee information - Australia

Re DPF issues, mine was at around 12,000km's , info on dash said DPF was 80% full regen in progress and counted down to 0%. My speed was only 50 - 60 kph and included a stop, so the regen worked as it should, now at 25500 km and it hasn't reoccured.

On a side note, if anyone out there would like to purchase a rear set of Airbags for their coil spring GC's I have a brand new unopened set made by Firestone USA, they are designed to fit inside the rear coils and are great for when you are towing.
Believe they fit from the 2011 model on.
PM me if interested.




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