DIY ECU Flash

disjaukifa · **Posted:** Wed Apr 30, 2014 10:17 am

pwrwagn wrote:

The rest of my trip... 473 miles, and 19.7 gallons.

350 of which was 75+ interstate. I've not made any high speed gains, only commuting gains.

24mpg is nothing to look down upon, that's really good. I try keeping my speed right at 75, I don't like reving my diesel engine much higher than that.

I need to log my last couple of tanks, I just haven't gotten around to it yet.

madmarkus1 · **Joined:** Thu May 01, 2014 12:52 am **Posts:** 3

Hi does any off this maps work on the grand cherokee crd3.0 2005 or can anybody point me in the right direction,excuse the ignorance i have no experience with this yet.

Yeti · **Posted:** Thu May 01, 2014 5:05 am

madmarkus1 wrote:

Hi does any off this maps work on the grand cherokee crd3.0 2005 or can anybody point me in the right direction,excuse the ignorance i have no experience with this yet.

sorry , but can't work , different ecu and map , you can try to read with mpps , but wait some one that have it and say you if it work on your GC if yes , you can post your original file and we can watch it

mass-hole · **Posted:** Thu May 01, 2014 10:02 am

madmarkus1 wrote:

Hi does any off this maps work on the grand cherokee crd3.0 2005 or can anybody point me in the right direction,excuse the ignorance i have no experience with this yet.

My guess is that you can probably retrieve and edit it the same way as the Liberty CRD folks do. It just a matter of tuning it.

madmarkus1 · **Joined:** Thu May 01, 2014 12:52 am **Posts:** 3

Yeti wrote:

madmarkus1 wrote:

Hi does any off this maps work on the grand cherokee crd3.0 2005 or can anybody point me in the right direction,excuse the ignorance i have no experience with this yet.

sorry , but can't work , different ecu and map , you can try to read with mpps , but wait some one that have it and say you if it work on your GC if yes , you can post your original file and we can watch it

Thank you will post it as soon as i have it ordered a cable

hucorey · **Joined:** Tue Mar 06, 2012 4:29 am **Posts:** 378

Just a tiny derail here but those interested in updating their TC for these hotter tunes. Please check out Edge torque converters (nothing to do with Edge Programmers). FYI, Suncoast is typically referred to "Suntoast" in the pickup forums which I'm very involved in BTW.

Back to our regularly scheduled program.

For those doing a lot of the R&R on these new tunes, do you guys have EGT sensors installed? I'd say it would be an absolute necessity for y'all. I just haven't had the chance to read through all the posts yet.

pwrwagn · **Joined:** Mon Jul 22, 2013 2:40 am **Posts:** 192

disjaukifa wrote:

pwrwagn wrote:

The rest of my trip... 473 miles, and 19.7 gallons.

350 of which was 75+ interstate. I've not made any high speed gains, only commuting gains.

24mpg is nothing to look down upon, that's really good. I try keeping my speed right at 75, I don't like reving my diesel engine much higher than that.

I need to log my last couple of tanks, I just haven't gotten around to it yet.

Well, it's no improvement at all over what I've gotten previously at 75+ speeds. It has always gotten the best fuel economy at 75-85. It has always seemed to do best running 2500+ rpm.

I think there's a LOT of fuel economy to be gained. I just don't know what the motor needs as compared to the the emissions strangulation it has now.

pwrwagn · **Joined:** Mon Jul 22, 2013 2:40 am **Posts:** 192

Does someone have the true definitions of each of the entries AND what the numbers mean?

For this:

We keep discussing this ad-hoc, and that's not effective.

Yeti · **Posted:** Sat May 03, 2014 2:48 pm

pwrwagn wrote:

Does someone have the true definitions of each of the entries AND what the numbers mean?

For this:

We keep discussing this ad-hoc, and that's not effective.

1° time open injector
2° Rail pressure
3° Rail pressure in emergency mode.........I think and I do not touch
4° Is a quantity of fuel injected in base of how many air coming
5° I'm not sure , but I think is a quantity of fuel in a partialized situation
6° angle of injection pre and post combustion
7° when you open the map called EGR you find a FCV and after the EGR......is an error
8° is the response of gas pedal , in base of the position "load" you call the torque requested
9° is a two limiter of the Gas pedal
10° Turbo prex
11° is the time you have for overboost
12° is turbo limiter in normal driving condition
13° is the Engine torque limiter
14° is the pressure limiter that the EGR ---Wastegate must maintain ......
15° is the torque limiter on the gear
16° and 17° is a Rail pressure limiter

out of mask we can find more map that have important task example the torque limiter after the engine torque and many other

pwrwagn · **Joined:** Mon Jul 22, 2013 2:40 am **Posts:** 192

Thanks Yeti... But we have a language barrier. I'm not sure what all you mean. Especially #1, 4, and 14.

Yeti · **Posted:** Sun May 04, 2014 5:12 am

pwrwagn wrote:

Thanks Yeti... But we have a language barrier. I'm not sure what all you mean. Especially #1, 4, and 14.

sorry , you are right ,

1° is the time of the injector stay open for a cycle .......5 cycle in our bosch system if I remember

4° regulates the quantity of diesel fuel based on the air inlet

14 ° is the limiter pressure in our intake

let me know if now is well , and if you need "other parameter"

pwrwagn · **Joined:** Mon Jul 22, 2013 2:40 am **Posts:** 192

Yeti wrote:

pwrwagn wrote:

Thanks Yeti... But we have a language barrier. I'm not sure what all you mean. Especially #1, 4, and 14.

sorry , you are right ,

1° is the time of the injector stay open for a cycle .......5 cycle in our bosch system if I remember

Ok, I think I get the others, but I'm not sure about #1...

There are 12 maps for #1. The numbers get smaller as rpm goes up, and larger as load goes up. Some of the maps are almost the
same as others.

It can't be timing advance of TDC It's reverse of advance (more of it at low rpm). It can't be fuel, because it decreases as rpm's go more.

I do not understand what it does, in any way.

Yeti · **Posted:** Sun May 04, 2014 9:02 am

the time decrease , because is compensate for rail pressure for best combustion at high load , more pressure less time , but increase a bit at high load for performance , more time , more fuel , more smoke , 12 map i think is for more situation , temperature etcc

mix angle of injection , time of it and pressure , watch every map and combine it

pwrwagn · **Joined:** Mon Jul 22, 2013 2:40 am **Posts:** 192

Ok, so I did some experimenting. #1 has only about 3 variations, with duplicates of each other making up all 12. I made them all the same (the highest one), and it runs horribly sick. Loud and no power.

Further, for # 6, I first made 1-3 and then made 1-5 the same. Again, reduced performance each time over my original mods.

So, the theory that 1-6 are for different gears... very unlikely true. I think it has something to do with each map being for a different shot of the multi-shot injection cycle, with one (#6) being very high numbers - that being some kind of limit or default, or adjustment from the default for each shot. - that being + and - the timing event (or quantity) of the default. It's my theory anyway.

As to the 12 maps of #1... Each of them has small areas that match directly or nearly spots in other maps, but vary by factors of nearly 1.7 or so in some places. There are only 3 different maps, with 4,6,7,9,10,12 all being identical. 1 and 3 are identical, and 11,8,5,and 2 being the same. ( I only specifically compared cells in the extreme quadrants)

Yeti · **Posted:** Sun May 04, 2014 2:31 pm

just a moment please , the 6°map has nothing to do with the gears , is the angle of injection start , if you can make a right adjustment you can change the angle for 2 degree ........I can't , I have not so much experience, and I'll suggest do not touch it , the N°1 with 12 map , if they are different , why yo make equal ? if you increase the value in one map , you must increase at same manner the other , even on the map regard the angle of injection the 4°and 5° must to be original , same the self map "limp mode " like the second rail pressure map , normally for increase performance you must add fuel starting about at 1500 rpm at 50% load do this in all 12 map , for starting , you can increase in percentage about an 8% and see what happen :wink:

, put a 80 100 point plus in turbo , example turbo pressure at 2350- 1000 mbar of atmospheric pressure =1350 of real value ,add 10 point 1360 .....100 point 1450 mbar 1,45 bar start to do this at same range and load of the fuel :wink:

pwrwagn · **Joined:** Mon Jul 22, 2013 2:40 am **Posts:** 192

Yeti wrote:

just a moment please , the 6°map has nothing to do with the gears ,

Correct. Someone in this thread thought it was.

Quote:

is the angle of injection start , if you can make a right adjustment you can change the angle for 2 degree ........I can't , I have not so much experience, and I'll suggest do not touch it , the N°1 with 12 map , if they are different , why yo make equal ? if you increase the value in one map , you must increase at same manner the other , even on the map regard the angle of injection the 4°and 5° must to be original , same the self map "limp mode " like the second rail pressure map , normally for increase performance you must add fuel starting about at 1500 rpm at 50% load do this in all 12 map , for starting , you can increase in percentage about an 8% and see what happen :wink:

, put a 80 100 point plus in turbo , example turbo pressure at 2350- 1000 mbar of atmospheric pressure =1350 of real value ,add 10 point 1360 .....100 point 1450 mbar 1,45 bar start to do this at same range and load of the fuel :wink:

Ok, here's the deal:

Rail pressure increases increase the fuel by the amount the rail pressure is increased, with NO change in duration (time injector is open). It also should be accompanied by a small increase in boost pressure.

However, this engine in US emissions settings has extremely poor fuel economy. And the torque limitation for the converter is terrible, as well. I want 450-475 nm torque, and I want to gain the fuel economy it should be able to have.

So, map #6 is labelled Boost X rpm - or, fuel / timing trim adjusted by boost. What I don't know, is what changing the values in the tables means. What is each specific table for? That would help. What I do know, is that removing the very low numbers in #6 - 1,2,3 improves fuel economy quite a bit, and seems to improve acceleration, without doing pretty much anything else.

So, I raise rail pressure (what appears to be the live map, not the limiters) by 3-8% depending on the rpm / load (nothing at low rpm) and increased the most at 1600 to 2800 area. For a given amount of fuel, it injects faster, which tends to create a better burn and higher peak pressures.

Still, the "why" there are 6 maps is something I need to know, in order to understand how to modify them. I know what emissions detuning does, what I don't know, is what the map values themselves do.

Yeti · **Posted:** Sun May 04, 2014 5:54 pm

pwrwagn wrote:

Yeti wrote:

just a moment please , the 6°map has nothing to do with the gears ,

Correct. Someone in this thread thought it was.

Quote:

is the angle of injection start , if you can make a right adjustment you can change the angle for 2 degree ........I can't , I have not so much experience, and I'll suggest do not touch it , the N°1 with 12 map , if they are different , why yo make equal ? if you increase the value in one map , you must increase at same manner the other , even on the map regard the angle of injection the 4°and 5° must to be original , same the self map "limp mode " like the second rail pressure map , normally for increase performance you must add fuel starting about at 1500 rpm at 50% load do this in all 12 map , for starting , you can increase in percentage about an 8% and see what happen :wink:

, put a 80 100 point plus in turbo , example turbo pressure at 2350- 1000 mbar of atmospheric pressure =1350 of real value ,add 10 point 1360 .....100 point 1450 mbar 1,45 bar start to do this at same range and load of the fuel :wink:

Ok, here's the deal:

Rail pressure increases increase the fuel by the amount the rail pressure is increased, with NO change in duration (time injector is open). It also should be accompanied by a small increase in boost pressure.

However, this engine in US emissions settings has extremely poor fuel economy. And the torque limitation for the converter is terrible, as well. I want 450-475 nm torque, and I want to gain the fuel economy it should be able to have.

So, map #6 is labelled Boost X rpm - or, fuel / timing trim adjusted by boost. What I don't know, is what changing the values in the tables means. What is each specific table for? That would help. What I do know, is that removing the very low numbers in #6 - 1,2,3 improves fuel economy quite a bit, and seems to improve acceleration, without doing pretty much anything else.

So, I raise rail pressure (what appears to be the live map, not the limiters) by 3-8% depending on the rpm / load (nothing at low rpm) and increased the most at 1600 to 2800 area. For a given amount of fuel, it injects faster, which tends to create a better burn and higher peak pressures.

Still, the "why" there are 6 maps is something I need to know, in order to understand how to modify them. I know what emissions detuning does, what I don't know, is what the map values themselves do.

the table determine when start the injection and when stop , the 4° and 5° I think is for "limp mode"
you want to try to change the logic of ecu , i understand it , but first you must understand how to increase performance in this logic , after you can do this , you can try to change the logic of injection , hope you can understand what i write :wink:

what you want is more difficult than a simple increase

pwrwagn · **Joined:** Mon Jul 22, 2013 2:40 am **Posts:** 192

Yeti wrote:

the table determine when start the injection and when stop , the 4° and 5° I think is for "limp mode"
you want to try to change the logic of ecu , i understand it , but first you must understand how to increase performance in this logic , after you can do this , you can try to change the logic of injection , hope you can understand what i write :wink:

what you want is more difficult than a simple increase

Oh, yes, I do understand that, very well. What I don't know, is by what means the tables interact - which ones interact - and what the values mean. I'm not just wanting "more", I'm looking for specific optimizations - the are:

Faster injection (less duration for same fuel), since this improves fuel efficiency. EVERY diesel engine these days spreads the injection out far beyond optimum for emissions purposes. One is to reduce peak temperatures and pressures, and the other is to reduce particulates. Disabling EGR dramatically reduces particulates, so that's not even a problem. What, however, happens when you remove EGR, is higher peak pressures and combustion temperatures. That improves efficiency. However, because you do not slow down the fuel burn with EGR, and don't need nearly the "late" injection to promote after-burn of the particulates that EGR creates, you can have an additional improvement. It means getting the fuel in a little faster and in some cases, a little earlier... and at high speed, possibly later.

I know what the engines need by experience. What I do not know, his how the tables are parsed and applied. As you say, I don't fully grasp the logic of the software and how it uses the data you give it.

What I do know, is that some moderate changes to maps 1-3 to remove some of the extreme negative numbers, results in a very significant improvement in economy and performance at 1600 to 2800.

Yeti · **Posted:** Mon May 05, 2014 3:00 am

ok , what you can try , is to increase the value where is negative in #3 map and after in #1 and #2 map copy the #3 map , but increase all value near the original value , example at 4500 rpm 100% load you have 845 in 3 map , in second map you have 975 ? increase all value to arrive at 975 , hope I'm clear , is difficult for me

Yeti · **Posted:** Mon May 05, 2014 3:14 am

ok , what you can try , is to increase the value where is negative in #3 map and after in #1 and #2 map copy the #3 map , but increase all value near the original value , example at 4500 rpm 100% load you have 845 in 3 map , in second map you have 975 ? increase all value to arrive at 975 , hope I'm clear , is difficult for me

DIY ECU Flash

Who is online