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  #385  
Old 11-13-2015, 04:31 PM
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Re: green diesel engineering tune

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Originally Posted by mrbillishere View Post
Thanks for the clarifications @2012 Summit, they way you put it definitely helped clarify my usage of the terms.

I wasn't aware that under normal highway conditions the EGTs were just too low to support passive regens but now that you say this, it makes a LOT of sense based on some of the crap that happened to me over the summer. Specifically, I was driving at highway speeds for hours and hours, for a week straight, and then lo and behold I got the 'DPF almost full' message on my EVIC the following day as I was driving around town. I was floored. Regardless, I still think the jeep was whacked out because the active regenerations that you described should have had ample opportunity to function in the background. And in a matter of days I had to take it in for service due to the incorrect DEF downhill spiral that's been discussed in other threads. Ultimately the replacement of my SCR put me right, I hope.

But back to my original question. Essentially, what I want to know is if we don't take the optional feature on the GDE tune that reports on all regens, we are still going to be informed if/when the DPF is almost full, as we do now. That's what I wanted to confirm. So, with the GDE tune, and without the optional 'show all regens' bit, the car will still display the 'DPF almost full' message on the EVIC (example attached) when needed. Correct?
Yes, you are correct. You will still get the warning message on the EVIC. The GDE option will notify when the regen is active prior to the critical soot level message.

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  #386  
Old 11-20-2015, 09:29 PM
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Re: green diesel engineering tune

I recently pulled the trigger of a GDE tune before driving across country on I40. My trip was from Orlando, FL to the East Bay area California, about 3000 miles towing a 5x8 aluminum cargo trailer. I would say total trailer weight is around 2000lbs. I towed at speed limit or over the entire way. So from Florida to Texas 70mph, through Texas to California 75mph and north in California at 60mph. Out of Amarillo I hit a head wind of about 30mph that lasted until about Arizona which really made the Jeep work to keep speed. Over the entire trip driving with no regard for fuel cost or consumption I averaged 19.57mpg hand calculated which I was extremely satisfied. The tune truly does make the Ecodiesel perform the way it should have from factory. The pedal feel is amazing and even with the trailer hooked up the thing just keeps pulling no matter the speed (did a few passes and highway on ramp entrances to about 90mph). With the trailer unhooked the jeep has a night and day difference in performance. All I can say is I should have done it sooner instead of waiting until 20K miles.
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  #387  
Old 11-28-2015, 02:22 PM
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Re: green diesel engineering tune

Necro'ing a post from five months ago, but I have been curious regarding the GDE modifications to the EPA-mandated inducement that eventually disables the vehicle if it is operated with an empty DEF tank:

Quote:
Originally Posted by GreenDiesel View Post
This is another feature only in our tune. Who wants to be stranded on the road in the middle of nowhere if they run our of def? I think that is a safety issue, so we turned it off. The vehicle will restart, but run in a reduced power mode until you dump in a bottle of def.
I totally agree that this is a safety issue and think this is a great feature to have. My question is how did the inducement end up being changed from disabling the vehicle to putting it in limp mode? That is to say, was it a design decision to put the vehicle in limp mode in this condition or was it the result of firmware limitations that couldn't be circumvented? Ideally the Jeep would never be disabled, put into limp mode, or otherwise adversely affected if the DEF tank were empty.

Being harassed about adding DEF via EVIC message (which I understand is still in place) would seem to be sufficient "inducement".
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  #388  
Old 11-28-2015, 04:30 PM
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Quote:
Originally Posted by Roadkill View Post
Necro'ing a post from five months ago, but I have been curious regarding the GDE modifications to the EPA-mandated inducement that eventually disables the vehicle if it is operated with an empty DEF tank:

I totally agree that this is a safety issue and think this is a great feature to have. My question is how did the inducement end up being changed from disabling the vehicle to putting it in limp mode? That is to say, was it a design decision to put the vehicle in limp mode in this condition or was it the result of firmware limitations that couldn't be circumvented? Ideally the Jeep would never be disabled, put into limp mode, or otherwise adversely affected if the DEF tank were empty.

Being harassed about adding DEF via EVIC message (which I understand is still in place) would seem to be sufficient "inducement".
I think a 10k mile range on your DEF is pretty sufficient to avoid " running out" in the "middle of the desert somewhere" scenario like most people who are anti DEF tend to quickly, and quite dramatically, gravitate towards. There are sufficient warnings with a range.... Like running out of gas. I've seen DEF at every pep boys, auto zone, advanced auto parts and even Lowes and Home Depot. And usually pretty cheap. I don't see what the big deal is lol.
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  #389  
Old 11-28-2015, 05:19 PM
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Re: green diesel engineering tune

Honestly, GDE's modification for their on road hot tune limp mode when def empty is right in line. If you run out of def with GDE you're just ignoring your EVIC. It lasts nearly forever.
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  #390  
Old 11-28-2015, 05:22 PM
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Quote:
Originally Posted by farfromovin View Post
Honestly, GDE's modification for their on road hot tune limp mode when def empty is right in line. If you run out of def with GDE you're just ignoring your EVIC. It lasts nearly forever.
I disagree. There's no reason to adversely affect the vehicle's operation in this condition. Besides, with your line of reasoning, why not simply leave the "disable the vehicle" inducement in place? It would certainly make the EPA happier, and if "disabling the vehicle" is a safety issue then the same argument can be made regarding forcing the vehicle into limp mode.
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  #391  
Old 11-29-2015, 12:41 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by Roadkill View Post
I disagree. There's no reason to adversely affect the vehicle's operation in this condition. Besides, with your line of reasoning, why not simply leave the "disable the vehicle" inducement in place? It would certainly make the EPA happier, and if "disabling the vehicle" is a safety issue then the same argument can be made regarding forcing the vehicle into limp mode.
The vehicle doesnt lock up its brakes and slow to 30mph when it runs out of DEF. It just enables limp mode instead of a no start condition. Like i said, you have to blatantly ignore your EVIC to run out. You get a 700 mile warning.

I don't think that's a safety issue, sounds like a lifeline.
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  #392  
Old 11-29-2015, 01:42 AM
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Quote:
Originally Posted by farfromovin View Post
The vehicle doesnt lock up its brakes and slow to 30mph when it runs out of DEF. It just enables limp mode instead of a no start condition. Like i said, you have to blatantly ignore your EVIC to run out. You get a 700 mile warning.

I don't think that's a safety issue, sounds like a lifeline.
Haha, yes, we all know you're a GDE fanboi. However, you really have drunk a bit too much of the koolaid when you find yourself trying to rationalize why an ostensibly pointless activation of limp mode is somehow to your benefit and is a "feature" simply because it's part of this tune.

None of what you have said has offered a valid rationale for why limp mode would activate rather than leaving the vehicle in normal operation mode. I'll wait to hear from GDE rather than our resident fanboi team that has been leaping to their defense... there may actually be a technical reason for GDE leaving a form of inducement operational.
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  #393  
Old 11-29-2015, 01:58 AM
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Re: green diesel engineering tune

Also, keep in mind the scenario people are dreading isn't running out of DEF. It is having your DEF line accidentally ripped out while you are on the trail, not knowing it happened and shutting it off for the night when you make camp, then not being able to start it since the vehicle thinks the system has been tampered with. Or being so remote that the mileage countdown won't get you back to civilization. Either way it is just a disaster waiting to happen, especially if you don't have the protection plate in place. And this is built into the software! Even limp mode should be better than nothing.
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  #394  
Old 11-29-2015, 02:43 AM
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Quote:
Originally Posted by hayasa View Post
Even limp mode should be better than nothing.
Actually, somewhat ironically, if the Jeep operates the same way that the Ram EcoDiesel does then the GDE tune's enforced limp mode may be worse than stock. On the Ram the stock "no start" DEF inducement condition can be trivially bypassed by jumpering the starter relay, whereupon the vehicle operates normally until it is shut down. I doubt there is a way to jumper-bypass the GDE tune's inducement the way one putatively can do with stock.

I guess that's probably a protip for owners on stock firmware: RESET IN CASE YOU GET THE "ENGINE WILL NOT RESTART" MESSAGE. THANKS GDE (cross-forum link, oh my!)
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  #395  
Old 11-29-2015, 08:05 AM
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green diesel engineering tune

99% of short term reliability problems with these engines up here have to do with the DEF system. the more tuned out the better imho.

For long term reliability anyone who plans to keep this engine 150000miles plus should consider the offroad tune instead with straight pipes and block the egr.

the enviromental "hazards" does not sit in the diesel emissions output on this thing,

it's 1000x fold as much in the failure of parts (like thousands of new cat
converters) and the making/waste of those parts.

Heading up next week for my GDE tune, looking forward to less throttle/turbo lag!
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  #396  
Old 11-29-2015, 08:30 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by Roadkill View Post
Actually, somewhat ironically, if the Jeep operates the same way that the Ram EcoDiesel does then the GDE tune's enforced limp mode may be worse than stock. On the Ram the stock "no start" DEF inducement condition can be trivially bypassed by jumpering the starter relay, whereupon the vehicle operates normally until it is shut down. I doubt there is a way to jumper-bypass the GDE tune's inducement the way one putatively can do with stock.

I guess that's probably a protip for owners on stock firmware: RESET IN CASE YOU GET THE "ENGINE WILL NOT RESTART" MESSAGE. THANKS GDE (cross-forum link, oh my!)
The relay certainly can be jumped with the GDE tune.
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