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  #961  
Old 03-14-2015, 06:04 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Oh, and currently there is no possibility to remove the DPF.

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  #962  
Old 03-14-2015, 08:18 AM
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Re: Is DPF issue for 2014 CRD fixed now?

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Originally Posted by Barboots View Post
Mate could you check if your service paperwork actually states that the 14/104 was done? This is really important to all us MY14-> owners. I'm hoping that it's been missed, or has been incorrectly executed.

Cheers,
Steve
Steve.

Do you mean me. If so the answer is yes, the 104 update has been done. Was applied during service in Jan.

Regards

Adrian
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  #963  
Old 03-14-2015, 08:40 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Hmm there was another poster who said they had a dpf failure after the Dec update was applied.. That's who Barboots was asking. Looks like the post was deleted?
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  #964  
Old 03-14-2015, 10:36 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Sorry Adrian... that reads a bit confusing now the relevant post has been deleted. I should have quoted it huh.

"As you were... "

Cheers,
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  #965  
Old 03-14-2015, 05:38 PM
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I wonder if the NA EcoDiesels manage the DPF differently. I drove over 400 km yesterday, nonstop at highway speeds, with the DPF % PID reading 100% the entire time. There were no warnings and the system never elected to initiate regen. Yes, I have confirmed the PID is correct (I have seen it drop post-regen).

I'm starting to wonder if there is more accurate data available outside of mode 1.
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  #966  
Old 03-15-2015, 03:44 AM
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Re: Is DPF issue for 2014 CRD fixed now?

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Originally Posted by Roadkill View Post
I wonder if the NA EcoDiesels manage the DPF differently. I drove over 400 km yesterday, nonstop at highway speeds, with the DPF % PID reading 100% the entire time. There were no warnings and the system never elected to initiate regen. Yes, I have confirmed the PID is correct (I have seen it drop post-regen).

I'm starting to wonder if there is more accurate data available outside of mode 1.

I've often wondered of the EVIC display is driven by some other parameters in Mode 22.
Finding them is the hard part. Significant time and effort for reverse engineering needed.
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  #967  
Old 03-15-2015, 06:40 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
As it is using pressure differences/ratio as I understand it, it won't be hard to trace down the appropriate sensors and replace them with a resistor of the appropriate value to trick the system into thinking the DPF is always low/clean.
Does it actually measure pressure at all?
Who knows?

It may actually only measure temperature. (Much easier to measure than pressure in an exhaust system.)
Anyway, from my long distant past as an engineer:
Boyle's Law, PV= nRT.

Measure temperature drop and you have a pretty good idea of pressure drop, as well.
And that might make it very difficult to trick using just resistors!

Secret men's business maybe, but I suspect that's how its done.

Cya
David
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  #968  
Old 03-15-2015, 09:40 AM
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Re: Is DPF issue for 2014 CRD fixed now?

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Originally Posted by Futuresystem View Post
Does it actually measure pressure at all?
Who knows?

..
.
.

Secret men's business maybe, but I suspect that's how its done.

Cya
David
Yep there's a differential pressure sensor under there.
It's mounted up in the side of the DPF housing with 2 tubes coming out of it.

This is the one out of the American car but he AU one looks almost the same. http://www.factorychryslerparts.com ........ exhaust diff pressure sensor
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  #969  
Old 03-15-2015, 06:08 PM
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Re: Is DPF issue for 2014 CRD fixed now?

If you don't have a diagnostic tool how do you know a regen of the DPF has happened?

My JGC only has 2400km and this issue concerns me. I still have my 15yr old Prado with 320,000km on it and it has only had normal service with no engine problems. Can the jeep measure up to this - time will tell.


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  #970  
Old 03-15-2015, 06:49 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Carnye View Post
If you don't have a diagnostic tool how do you know a regen of the DPF has happened?
More than likely you won't.

Quote:
Originally Posted by Carnye View Post
My JGC only has 2400km and this issue concerns me. I still have my 15yr old Prado with 320,000km on it and it has only had normal service with no engine problems. Can the jeep measure up to this - time will tell.
I hope you are correct- but very much doubt it.
The JGC is much more hitech, and runs dramatically cleaner than older generation diesels. I dare say we will pay the price for that, with significantly more issues for at least some people.

FWIW I'm currently staying for a week with our van in a Sunshine Coast caravan park. There are LOTS of JGC's here. Most people I've spoken to have had a good run, but two (out of about eight people I've spoken to) have had theirs on a tilt tray twice- and both related to the DPF, both were MY14's, and both were highway driving (or just had been) when they had issues. There is nothing scientific about my "research" but it is interesting all the same, and proves there have been significant problems in that area. Let's hope the Dec18 update fixes it once and for all.




Quote:
Yep, there's a differential pressure sensor under there.
It's mounted up in the side of the DPF housing with 2 tubes coming out of it.

This is the one out of the American car but he AU one looks almost the same. Chrysler Parts, Dodge Parts, Jeep Parts - Authentic OEM Car & Truck Parts Direct | Factory Chrysler Parts ........ exhaust diff pressure sensor

Thanks Steve, interesting.
There is no doubt that it would not be easy to remove the DPF and "trick the system." However, much as I like having a clean exhaust, if the dramas continue there will be huge incentive for us to remove the filter with a software fix to get around it.

It's also interesting that 200 series LC's don't have one. I have noticed a small amount of soot coming from the odd one from time to time but on the whole, they seem to burn pretty clean.

Cheers
David
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  #971  
Old 03-15-2015, 08:08 PM
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Quote:
Originally Posted by Futuresystem View Post
Does it actually measure pressure at all?
Who knows?

It may actually only measure temperature. (Much easier to measure than pressure in an exhaust system.)
Anyway, from my long distant past as an engineer:
Boyle's Law, PV= nRT.

Measure temperature drop and you have a pretty good idea of pressure drop, as well.
And that might make it very difficult to trick using just resistors!

Secret men's business maybe, but I suspect that's how its done.

Cya
David
Huh? How would they know n ( how many moles of gas ) are in the closed system? Usually that equation is for closed systems.
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  #972  
Old 03-15-2015, 08:52 PM
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Re: Is DPF issue for 2014 CRD fixed now?

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Originally Posted by coreys View Post
Huh? How would they know n ( how many moles of gas ) are in the closed system? Usually that equation is for closed systems.

Yes, you're absolutely correct.
I didn't think that one through, that's why drinking red wine before posting is a risky business.

Anyway, Steve clarified it all.

Cheers
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