RAM 1500 Diesel Forum banner

1 - 20 of 21 Posts

·
Registered
Joined
·
43 Posts
Discussion Starter #1
Got the AEM over a month ago, so I have put some miles on the original ECM. When I switch back to the ECM with the GDE tune should I just follow the same procedure that I used when I first got the GDE tune? Should I try to time it so that it is switched back right after a regen has completed? I recall when I first installed the GDE tuned module it ran through the "90% plugged process", This time the tuned ECM won't be coming right from GDE, so my thought is it would not automatically run through that process when I put it back in.
 

·
Administrator
Joined
·
8,465 Posts
Do you recall what percentage the GDE ECM was at when you removed it? That's the value I would want to match. When you reinstall the GDE that's exactly what the ECM will indicate is current.
 

·
Registered
Joined
·
286 Posts
I thought I read it was re installed the same way as first time because it doesn't know where your soot % is on install and has to regen to start fresh. I am not positive about that. I am sure someone on here knows for certain. Good luck.
 

·
Registered
Joined
·
3,748 Posts
on subsequent swaps , the ECM will not send you on a regen ride ,
Lifeson is right , if possible wait after a regen , then swap modules .
If the removed module remembers you are at 15% ,
on next install it will go from there , if you are actually at 60 % , it will take a long time before the 66% is reached ,
taking you to high levels of soot in DPF .

BUT , I read that there is more data used to trigger a regen , like differences in pressure sensors , pre , and post DPF ,
" the first one ", of a couple different sets of watched parameters reached , will trigger the regen , even if other parameters watched did not reach
the trigger point , I guess only someone like GDE could answer that one . is it safe to trust that ?????

..
if you have a 2014,2015,2016 , with a Edge monitor , no sweat ,
you ask the truck to start a regen with the monitor , ( called "mobile regen" in diagnostic section ,of Edge monitor ) ,
and it will start as soon as minimum temperatures required are reached , no matter the soot % .

with a monitor or less expensive Torque Pro App you see the soot % all the time ,
just put a piece of masking tape on removed module , with soot % written on masking tape for next swap.
 

·
Administrator
Joined
·
8,465 Posts
BUT , I read that there is more data used to trigger a regen , like differences in pressure sensors , pre , and post DPF ,
first one , of a couple different sets of watched parameters reached , will trigger the regen , even if other parameters watched did not reach
the trigger point ,.
You are correct my friend and GDE has commented on this in the past. I'll repost it because I know you will put it in your archives. You somehow have things organized much better than me.

Soot Loading Strategy (Quoted from Forum Sponsor GDE)
The ECU runs two different strategies in parallel and takes the higher of the two outputs to determine the current soot loading:

Strategy 1 is a simulated value, and is calculated according to how complete the previous regeneration was, and how the engine/vehicle has been operating since then (engine speed, load, ambient conditions, exhaust temps, etc). Different OEMs design different variations of such a strategy, but for the most part the high level concepts are similar. The strategy employed by the Ram's stock tune is fairly rudimentary.

Strategy 2 is a physically measured value calculated off of measured pressure drop across the DPF, the DPF temperature, and the known flow rate of exhaust gasses.

The soot loading is used to trigger the regeneration when all the correct criteria are met.


Just as a note for some more info...

Passive regens happen when there is sufficient exhaust temperature and a favorable NO2/NOx ratio for the soot to burn. This phenomena will happen starting with exhaust temps in the 380-400°C range.
However...the stock tunes are not capable to detect that passive regeneration is taking place, and to thus slow the modeled accumulation of soot and/or decrease it if the burn rate exceeds the production rate. This is why the intervals are not improved more in the highway cycles.

...we fixed this with our tunes, in order to avoid regenerating when it's not necessary.

the DPF is made to withstand a certain number of regens by being taken to very high
temperatures , so the less regens the better.
 

·
Registered
Joined
·
3,748 Posts
Thanks Joe , copied to my Regen file , then I found my notes ...
you already quoted that stuff before LOL
post # 31 here :
https://www.ram1500diesel.com/forum/ram-1500-diesel-general-discussion/59098-regen-question-2.html

and :
post # 5 here :
https://www.ram1500diesel.com/forum/ram-1500-diesel-tuning/61636-regen-numbers-since-gde.html

and :
post # 11 here :
https://www.ram1500diesel.com/forum/ram-1500-diesel-general-discussion/9177-regeneration-process.html
..
All from original,,
post # 69 and 72 together here :
https://www.ram1500diesel.com/forum/ram-1500-diesel-general-discussion/7853-fca-detuned-our-engines-give-themselves-room-market-advertise-power-gains-4.html

I guess I'm getting lazy , I could have linked one of your posts instead of my bla bla bla .:rolleyes:
 

·
Registered
Joined
·
12,957 Posts
So what is wrong with just doing the normal "new install" procedures?

That's what I did with mine but it was one I just got back from GDE.
 

·
Administrator
Joined
·
8,465 Posts
So what is wrong with just doing the normal "new install" procedures?

That's what I did with mine but it was one I just got back from GDE.
If you kept your GDE ECM and used the original for the AEM, you won't see the regen option when you put the GDE ECM back in.
 

·
Registered
Joined
·
43 Posts
Discussion Starter #10
Why did you wait so long to reinstall the GDE tune?
Mainly because right after I got the update my wife and kids were headed out of town with the truck (my job kept me from going on this particular trip), and since everything was running fine I just decided not to mess with it. I wasn't thinking about the regen status being out of sync. Then when they got back after adding 1500 miles or so, I thought of the regen issue, so I've been putting it off ever since.
 

·
Registered
Joined
·
43 Posts
Discussion Starter #11
Do you recall what percentage the GDE ECM was at when you removed it? That's the value I would want to match. When you reinstall the GDE that's exactly what the ECM will indicate is current.
My custom torque app settings disappeared a while back, so I wasn't even monitoring.
 

·
Registered
Joined
·
43 Posts
Discussion Starter #12
It seems if I wait until right after a regen, then swap, the worst case is the GDE tuned ECM does the burn-off very early because it's memory says it's close to a regen. That seems no worse than immediately doing a burn-off like a newly tuned GDE module does.
 

·
Registered
Joined
·
58 Posts
If your GDE was built a while ago, you might contact GDE to see if they’ve updated the tune since yours.
While it’s out of your RAM, your free to mail it in for the $50 update, if there've been changes you want to get AND when you get the updated ECU back it WILL do the’full-Monte” Regen since prior state info will have been wiped.
Another possibility....
 

·
Registered
Joined
·
136 Posts
The GDE updated software is the AEM software with the GDE modifications, so will show its the AEM software if the dealer checks it. Any time GDE has an update to their tune, its the lasted FCA update out.
 

·
Registered
Joined
·
3,748 Posts
The GDE updated software is the AEM software with the GDE modifications, so will show its the AEM software if the dealer checks it. Any time GDE has an update to their tune, its the lasted FCA update out.
Exactly , this is how GDE said that :
..
GDE about the tune :

We are not writing new software in the Bosch ecm.
There are literally almost 18,000 maps, curves, labels, arrays, etc. in the code.
FCA paid millions for this development and Bosch has hundreds of software coders for this task.
We change the data inside the existing software.
To develop a ground up ecm to work like the Bosch module might be a 50 million dollar venture.
Bosch amortizes those expenses with many vehicle manufacturers that use the same EDC17 ecm.

from thread :post #49
https://www.ram1500diesel.com/forum/green-diesel-engineering/47761-want-tune-newbie-3.html
 

·
Registered
Joined
·
450 Posts
The GDE updated software is the AEM software with the GDE modifications, so will show its the AEM software if the dealer checks it. Any time GDE has an update to their tune, its the lasted FCA update out.
Good to know they start with a baseline of the latest FCA flash. I guess they have it once someone sends in a unit that's had the AEM update, and we know CaptainM already sent his in. :)
 

·
Registered
Joined
·
43 Posts
Discussion Starter #20
If your GDE was built a while ago, you might contact GDE to see if they’ve updated the tune since yours.
While it’s out of your RAM, your free to mail it in for the $50 update, if there've been changes you want to get AND when you get the updated ECU back it WILL do the’full-Monte” Regen since prior state info will have been wiped.
Another possibility....
My tune is less than a year old, so I decided not to go that route. Yesterday I checked the "soot %" with Torque, and it was at 64%. Today I took the truck for a spin and ran it through a regen. By the time I got home it was at 12.5%. Then I put the GDE tuned ECM back in. Now it's reading 38%, so things should be fine with that. This time I'll need to remember the stock ECM thinks it's at 12.5% in case I never need to put it back in.
 
1 - 20 of 21 Posts
Top