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  #13  
Old 03-26-2014, 05:49 PM
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Quote:
Originally Posted by Rexlion View Post
I can't think of a reason why regen would not occur at a sustained high rpm even if not at highway speed. In other words, if in limp mode, can the vehicle be driven on the city streets at 2500 rpm or so for long enough to get a regeneration?
Someone try it and let the forum know.
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  #14  
Old 03-26-2014, 06:15 PM
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Re: DEF Filter Warnings

Quote:
Originally Posted by Rumline View Post
Someone try it and let the forum know.
Regen occurs at 1200°F EGT. You would need a heavy load behind you to create that type of EGT. High RPMs lower the EGT so no, I doubt driving at 2500 RPM will clean the DPF.

During normal regen, the highest temps are at 55 in 8th gear according to my Scanguage II. Going up of down a hill drops the EGT.
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Old 03-26-2014, 08:52 PM
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Re: DEF Filter Warnings

Z,

Could any of your mods be causing this? Can't remember if you've done a tune/bluespark type mod yet... Though if I'm not mistaken, ExcursionDiesel runs bluespark without a problem. Could be the setting? Me not being a "diesel guy" yet, my logic may be flawed, but here goes anyway:

Wouldn't a tune dumping more into the mix cause more particulate, and thus fill the DPF faster? Therefore, if you're running a tune and make a lot of short trips with a heavy foot, it seems like the DPF would fill quickly. If you seldom get on the highway to trigger a regen...

Again, I'm no diesel expert. Given everything put forth in this thread so far, it sounds like there's truly something amiss with your SFU in particular (boo! bad pun!!)
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Old 03-26-2014, 08:58 PM
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Re: DEF Filter Warnings

Quote:
Originally Posted by Zybane View Post
...I didn't think it was that huge of a deal as the message "filter regenerating" came on quite often. So does the system only really regenerate at highway speed?...
For clarification, when this message came up (as you say, "quite often"), have you driven at highway speed after? Me not owning one yet, I can only go on my fuzzy understanding, but I thought the message states something to the effect of "regen in progress, drive at highway speed." Is it possible that your jeep has been calling for a regen for quite some time, and has never actually gone through one?
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Old 03-26-2014, 09:20 PM
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Re: DEF Filter Warnings

The greatest amount of particulate (soot) creation is under conditions where there is too much fuel and not enough air (rich, in gas engine terms). This occurs at low rpm/high load conditions before the turbo begins delivering more air. I have verified that the fuel flow on cold starts is much greater than identical rpm when warm. I suspect more particulate is generated. Also, start/stop driving allows the turbo to spin down...more soot.

My Bluespark tuning box only adds fuel on higher demand and my mpg is identical if I drive conservatively. I'm sure more soot is produced under heavy throttle but I drive on the highway nearly everyday and have had no issues so far.
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Old 03-26-2014, 11:11 PM
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Re: DEF Filter Warnings

What got me was that the car would keep saying "regen in progress" but the message wouldn't go away, even driving 30-40 MPH. Doing that a couple of drives, next thing I know I get the filter 100% full - see dealer message.

Like others have stated, I think the only time it actually regen's is at actual highway speed. So if you get that message going slower, it's not really doing anything. You seriously need highway speed like Excursion said.

Took the Jeep to the dealer and it's turning into a two-day/rental car affair. It's not because the procedure is complicated, but of course the small town Jeep dealer service center is all booked up.

Limp mode REALLY means limp mode. It locks in 3rd gear, and without beating up the engine yu can only do around 20 MPH. Now have this happen a long way from a Jeep dealer, and you can see the pain that would bring. Luckily I was only 7 miles away. If it was 30+, I'd have it towed.

I tend to push the limits, and it bites me once and a while. But if you don't push the limits, you never know where they are.
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Old 03-27-2014, 01:25 AM
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That sounds pretty bad to me. If my car said "regen in progress" I would assume that it meant regen was actually occuring and after a while of driving I'd be good. Turns out what it really meant was "just kidding, enjoy limp mode LOL."
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Old 03-27-2014, 11:19 AM
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Re: DEF Filter Warnings

That sucks, Z!

The following verbiage is copy/pasted from the diesel supplement:

Quote:

Intervention Regeneration Strategy – EVIC

Message Process Flow

This engine meets all required EPA diesel engine emissions
standards. To achieve these emissions standards,
your vehicle is equipped with a state-of-the-art engine
and exhaust system. These systems are seamlessly integrated
into your vehicle and managed by the Powertrain
Control Module (PCM). The PCM manages engine combustion
to allow the exhaust system’s catalyst to trap and
burn Particulate Matter (PM) pollutants, with no input or
interaction on your part.
Additionally, your vehicle has the ability to alert you to
additional maintenance required on your vehicle or engine.
Refer to the following messages that may be displayed
on your Electronic Vehicle Information Center
(EVIC):

WARNING!
A hot exhaust system can start a fire if you park over
materials that can burn. Such materials might be
grass or leaves coming into contact with your exhaust
system. Do not park or operate your vehicle in areas
where your exhaust system can contact anything that
can burn.


Perform Service
Your vehicle will require emissions maintenance at a set
interval. To help remind you when this maintenance is
due, the Electronic Vehicle Information Center (EVIC)
will display “Perform Service”. When the “Perform Service”
message is displayed on the EVIC it is necessary to
have the emissions maintenance performed. The procedure
for clearing and resetting the Perform Service
indicator message is located in the appropriate Service
Information.

Exhaust System – Regeneration Required Now
Exhaust Filter XX% Full Safely Drive at Highway Speeds
to Remedy will be displayed on the Electronic Vehicle
Information Center (EVIC) if the exhaust particulate filter
reaches 80% of its maximum storage capacity. Under
conditions of exclusive short duration and low speed
driving cycles, your diesel engine and exhaust after treatment
system may never reach the conditions required
to cleanse the filter to remove the trapped PM. If
this occurs, the “Exhaust Filter XX% Full Safely Drive at
Highway Speeds to Remedy” message will be displayed
in the EVIC. If this message is displayed, you will hear
one chime to assist in alerting you of this condition.
By simply driving your vehicle at highway speeds for up
to 20 minutes, you can remedy the condition in the
particulate filter system and allow your diesel engine and
exhaust after-treatment system to cleanse the filter to
remove the trapped PM and restore the system to normal
operating condition.

Exhaust System – Regeneration In Process Exhaust
Filter XX% Full

Indicates that the Diesel Particulate Filter (DPF) is self cleaning.
Maintain your current driving condition until
regeneration is completed.

Exhaust System – Regeneration Completed
Indicates that the Diesel Particulate Filter (DPF) self cleaning
is completed. If this message is displayed, you
will hear one chime to assist in alerting you of this
condition.

Exhaust Service Required – See Dealer Now
Regeneration has been disabled due to a system malfunction.
At this point the engine Powertrain Control Module
(PCM) will register a fault code, the instrument panel will
display a MIL light.


CAUTION!
See your authorized dealer, as damage to the exhaust
system could occur soon with continued operation.


Exhaust Filter Full – Power Reduced See Dealer
The PCM derates the engine in order to limit the likelihood
of permanent damage to the after-treatment system.
If this condition is not corrected and a dealer service
is not performed, extensive exhaust after-treatment damage
can occur. In order to correct this condition it will be
necessary to have your vehicle serviced by your local
authorized dealer.

CAUTION!
See your authorized dealer, as damage to the exhaust
system could occur soon with continued operation.
It's not clear enough in the text above, but it seems like if after the first warning ("Regeneration required now") if you don't get on the highway SOON and drive for up to 20 minutes, you could be putting yourself on the road to limp mode. If you get the "regeneration in progress" message and have to get off the highway or run into traffic, you could be putting yourself on the road to limp mode. Basically, if/when I see either of those messages, I'll be be on pins and needles until I see the "Regeneration Completed" message.

That DOES seem rather inconvenient. For the rest of our sake, let's hope something is WRONG with Zybane's exhaust system.

Again, that sucks, Z.
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  #21  
Old 03-27-2014, 02:42 PM
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Re: DEF Filter Warnings

The message "regenerating" should never come on if you aren't doing highway speed and highway speed is needed. Once "regenerating" is displayed, it doesn't mention anything about highway speed after that.

So now it's three days at dealer. Yes, three days at the dealer to do a simple filter regen. They say it's taking so long because they have to contact Chrysler and work through other codes that were thrown because of the full filter. Anyone and everyone knows on a modern vehicle that one issue will usually trip many codes, doesn't mean you need to go down a rabbits hole of wasted time.

I told them to reset the ECU and PCM, do the regen burn and everything would be good to go but they wouldn't do it. And this particular dealership service isn't open on the weekend. So this "event" could be a 5-6 day trial costing me over a grand as I was suppose to leave back for home three states away today.

Anyone want to buy a Jeep cheap?
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Old 03-27-2014, 04:01 PM
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Zybane,

Did your evic give a percentage while you thought it was regen'ing? Like "Regeneration in process - Exhaust Filter XX% full"? If so, did you see the % go up or did it remain constant?
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Old 03-27-2014, 04:26 PM
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Re: DEF Filter Warnings

It doesn't give a swinging percentage. I've only ever seen two messages: "Near Full" and "100% Full".

The exact messages and "dings" in the manual aren't worded how they actually appeared, nor in order. The only time it ever "dinged" was once it had tripped into limp mode. The systems seems very flaky. I can see why the Aus guys are having such issues with it.
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Old 03-27-2014, 05:20 PM
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Re: DEF Filter Warnings

Quote:
Originally Posted by Zybane View Post
Anyone want to buy a Jeep cheap?
I'll buy that POS from you for 25k...

Seriously, you have a good vehicle. You just need to drive it in a manner that complies with the DPF requirements. I suspect yours reached the point of no return before you had that chance...probably due to it being partially full at delivery and city only driving afterwards. Once its cleaned out, you might be fine if you get out and run it periodically.

The offer still stands though. I'll even come pick it up.
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