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  #193  
Old 07-09-2015, 10:42 PM
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Re: green diesel engineering tune

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Originally Posted by chadg2 View Post
Does our little Diesel still need an Oil Catch Can with the Hot Tune flashed ECU?
Since the ecodiesel doesn't technically need a catch can, I assume you ask if ccv still blows oily vapor into the intake and the answer is yes. There is nothing to change via software to change that physical trait.

That's why I added a CCV catch can with the tune, take care of the EGR and CCV simultaneously and forget about it. It's a good compromise of maximizing economy and longevity without living with the dpf/non-emissions diesel. I just got done driving one of those, and while it was fun for a few years, the Jeep is just so nice with what emissions is left with GDE.

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  #194  
Old 07-10-2015, 10:46 AM
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Re: green diesel engineering tune

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Originally Posted by stician View Post
EGR robs power and the stupid Eco mode that retards fly by wire throttle to meet MPG target. Except when the SCR doesn't get hot enough to burn off soot, fuel is added, which drives down MPG. Either FCA is terrible at tuning or they went Ultra conservative. So who knows.
another reason to hate the government. Thanks, just what I needed.

I'll watch this thread closely. I'm currently leaning towards the purchase GDE and keep my ECM route.
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  #195  
Old 07-10-2015, 12:45 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by stician View Post
EGR robs power and the stupid Eco mode that retards fly by wire throttle to meet MPG target. Except when the SCR doesn't get hot enough to burn off soot, fuel is added, which drives down MPG. Either FCA is terrible at tuning or they went Ultra conservative. So who knows.
It's the DPF (Diesel Particulate Filter) that regenerates. The SCR (Selective Catalytic Reduction) works in conjunction with the DEF (Diesel Exhaust Fluid).
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  #196  
Old 07-10-2015, 12:54 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by stician View Post
EGR robs power and the stupid Eco mode that retards fly by wire throttle to meet MPG target. Except when the SCR doesn't get hot enough to burn off soot, fuel is added, which drives down MPG. Either FCA is terrible at tuning or they went Ultra conservative. So who knows.
Just so that everyone is on the same page, pressing the ECO mode button on the JGC does absolutely nothing to the engine controller. All torque filtering, drivability, accelerator pedal mapping, etc is the same no matter what mode you are in.
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  #197  
Old 07-10-2015, 12:57 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by GreenDiesel View Post
Just so that everyone is on the same page, pressing the ECO mode button on the JGC does absolutely nothing to the engine controller. All torque filtering, drivability, accelerator pedal mapping, etc is the same no matter what mode you are in.
Even Sport mode?
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  #198  
Old 07-11-2015, 12:28 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by stician View Post
Even Sport mode?
Yes - eco, normal, and sport mode are completely unknown to the engine controller.

The only info utilized by the engine controller is the status of 4wd low which gets you a different accelerator pedal mapping and idle speed when it's active.
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  #199  
Old 07-11-2015, 02:20 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by GreenDiesel View Post
Yes - eco, normal, and sport mode are completely unknown to the engine controller.

The only info utilized by the engine controller is the status of 4wd low which gets you a different accelerator pedal mapping and idle speed when it's active.
Huh. Are you saying that is the case in a stock JGC, or after the tune?

Sport makes a big difference it feels to me. And getting back to the question, while running the GDE tune, pressing Eco does nothing, but does going into Sport also do nothing?
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  #200  
Old 07-11-2015, 07:43 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by hayasa View Post
Huh. Are you saying that is the case in a stock JGC, or after the tune?

Sport makes a big difference it feels to me. And getting back to the question, while running the GDE tune, pressing Eco does nothing, but does going into Sport also do nothing?

He said they do nothing to the ECM. There is no difference to the throttle or engine mapping with those buttons. They are purely transmission related (and ride height). If you don't believe them, I got some snake oil out back for sale, it'll cure every ailment ya got.
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  #201  
Old 07-12-2015, 05:51 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by GreenDiesel View Post
Yes - eco, normal, and sport mode are completely unknown to the engine controller.

The only info utilized by the engine controller is the status of 4wd low which gets you a different accelerator pedal mapping and idle speed when it's active.
I guess what I feel in sport mode has to do with the transmission holding the gear longer?
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  #202  
Old 07-13-2015, 11:18 AM
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Re: green diesel engineering tune

GDE tune installed. Swapping the ECU is a 3-4 minute job. It took me longer to find my 8mm wrench than actually swapping the ECU.

I've only driven it 150 miles or so. Too early to give any solid reviews. One thing I can say is that it is so perfectly integrated. I've tuned a lot of diesels (and gassers) and you always knew they were not stock but this GDE tune, it's just like they should have made it from the factory. Literally NO downsides that I can see. It's like stock, but better.

I can spot a mpg difference but with so few miles it's too early to claim anything. I will say in town the instant meter seems notably higher, on the highway only very slightly higher.

The engine is smooth and purrs. Personally I didn't notice any increase in noise or roughness. At one point with the windows down, it sounded like a gasser it was so smooth. A couple of times it sounded different than stock (coasting no throttle) but maybe that's hypersensativity on my part.

I always thought I wanted to know when it was regening but now I'm not so certain. I enjoy the info but that message will confuse my wife (it's her car), and it would also tip off a tech that it was modified. Otherwise you would never know it had been touhed. In my life, it's unlikely that I would drive 15 minutes down the highway to complete a regen anyways so what's it matter?

I essentially hypermile I guess. I roll in to the throttle very easy. I don't take off fast only to have to apply the brakes in 100'. I do drive 75+mph when traffic allows. As a result, I never had a problem with the power or lag of the OEM tune. The Jeep is faster for sure but so smooth that it's deceptive. That aspect, while nice, is sort of minor for me.

Is it true there is a cover for the OBD port that says "don't reprogram"? If yes, where can I buy something like that?

I'm interested in buying the soon to be released AFE Momentum intake for the Jeep once it's released. The guys at GDE feel it's unnecessary due to minimum restriction out of the OEM system. But my experience has shown that aftermarket intakes can make quite an improvement in engine responsiveness. I'd like to hear what others have to say about aftermarket air intakes on Eco-Ds.
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  #203  
Old 07-13-2015, 01:27 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by stician View Post
I guess what I feel in sport mode has to do with the transmission holding the gear longer?
Yes, you are correct. The TCM for the transmission is what is controlling the way the transmission acts (holding gear longer, staying in lower gear). In ECO, the transmission wants to jump up to higher gears as soon as the torque is there for that gear.
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  #204  
Old 07-13-2015, 01:34 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by Suns_PSD View Post
GDE tune installed. Swapping the ECU is a 3-4 minute job. It took me longer to find my 8mm wrench than actually swapping the ECU.

I've only driven it 150 miles or so. Too early to give any solid reviews. One thing I can say is that it is so perfectly integrated. I've tuned a lot of diesels (and gassers) and you always knew they were not stock but this GDE tune, it's just like they should have made it from the factory. Literally NO downsides that I can see. It's like stock, but better.

I can spot a mpg difference but with so few miles it's too early to claim anything. I will say in town the instant meter seems notably higher, on the highway only very slightly higher.

The engine is smooth and purrs. Personally I didn't notice any increase in noise or roughness. At one point with the windows down, it sounded like a gasser it was so smooth. A couple of times it sounded different than stock (coasting no throttle) but maybe that's hypersensativity on my part.

I always thought I wanted to know when it was regening but now I'm not so certain. I enjoy the info but that message will confuse my wife (it's her car), and it would also tip off a tech that it was modified. Otherwise you would never know it had been touhed. In my life, it's unlikely that I would drive 15 minutes down the highway to complete a regen anyways so what's it matter?

I essentially hypermile I guess. I roll in to the throttle very easy. I don't take off fast only to have to apply the brakes in 100'. I do drive 75+mph when traffic allows. As a result, I never had a problem with the power or lag of the OEM tune. The Jeep is faster for sure but so smooth that it's deceptive. That aspect, while nice, is sort of minor for me.

Is it true there is a cover for the OBD port that says "don't reprogram"? If yes, where can I buy something like that?

I'm interested in buying the soon to be released AFE Momentum intake for the Jeep once it's released. The guys at GDE feel it's unnecessary due to minimum restriction out of the OEM system. But my experience has shown that aftermarket intakes can make quite an improvement in engine responsiveness. I'd like to hear what others have to say about aftermarket air intakes on Eco-Ds.
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