DIY ECU Flash

flash7210 · **Posted:** Fri Mar 11, 2016 4:45 pm

Oh, one more thing...

If it were a high pressure fuel system problem, the engine would go into limp mode and you would have severely reduced power. So if thats not happening then you need to focus on the low pressure side.

mass-hole · **Posted:** Fri Mar 11, 2016 5:30 pm

flash7210 wrote:

My AutoMeter fuel rail pressure gauge is wired directly to the fuel rail pressure sensor. If there were a pressure sensor problem it would either display zero pressure or an erratic reading.

I dont know which app you are using but when I use TorquPro its not a direct reading from the fuel pressure sensor. I can have the engine idling and then unplug the pressure sensor, TorquePro will display 26,400 psi. Obviously this is not true. If it were a direct read of the sensor it would display 0 psi. And at idle rail pressure is nowhere near 26,000 psi.
That 26,000 psi reading comes from ECU demanding the rail pressure solenoid to go to max pressure because the ECU can no longer tell what pressure actually is.

This is clue for diagnosing a high pressure fuel system problem. If torquepro displays pressure of 26,000psi at idle, the problem is the pressure sensor or the wiring to the pressure sensor.

Could it be possible that the sensor goes to 0V as the pressure increases so that the ECU thinks its at 26,000 psi when its actually unplugged? Even with the Yeti stage IV it should never request 26000 psi, only 24000 or so.

It just seems like the reading bounces around a lot while the jeep is in Park at idle for it to not be an actual reading.

Yeti · **Posted:** Fri Mar 11, 2016 6:07 pm

more fuel pressure in our jeep is not more fuel but shorter time of pulse injetion , is needed when increase IQ , less smoke and fuel burn well and to perform another task, that of not to empty the flute of the rail

flash7210 · **Posted:** Fri Mar 11, 2016 6:54 pm

mass-hole wrote:

flash7210 wrote:

My AutoMeter fuel rail pressure gauge is wired directly to the fuel rail pressure sensor. If there were a pressure sensor problem it would either display zero pressure or an erratic reading.

I dont know which app you are using but when I use TorquPro its not a direct reading from the fuel pressure sensor. I can have the engine idling and then unplug the pressure sensor, TorquePro will display 26,400 psi. Obviously this is not true. If it were a direct read of the sensor it would display 0 psi. And at idle rail pressure is nowhere near 26,000 psi.
That 26,000 psi reading comes from ECU demanding the rail pressure solenoid to go to max pressure because the ECU can no longer tell what pressure actually is.

This is clue for diagnosing a high pressure fuel system problem. If torquepro displays pressure of 26,000psi at idle, the problem is the pressure sensor or the wiring to the pressure sensor.

Could it be possible that the sensor goes to 0V as the pressure increases so that the ECU thinks its at 26,000 psi when its actually unplugged? Even with the Yeti stage IV it should never request 26000 psi, only 24000 or so.

It just seems like the reading bounces around a lot while the jeep is in Park at idle for it to not be an actual reading.

wilco549 · **Posted:** Sat Mar 12, 2016 9:51 am

Using OBDwiz to monitor rail pressure, The max pressure I've seen in 21,100 psi at about 3500 rpm. Average around 18,000 psi around 2500 rpm on a short test drive.

kouik · **Posted:** Sat Mar 12, 2016 10:31 am

mass-hole wrote:

Did you ever figure this out?

These are how I got all the info on how SOI maps work:

https://www.youtube.com/watch?v=m9zBF7dRYMU

https://www.youtube.com/watch?v=WoOBaTTI7fo

https://www.youtube.com/watch?v=zZA0xX0ExhY

Update!!!
I started working on a tune that seems promising, my goal was to find a way to produce more power by touching up only the 6 SOI maps, I wanted to improve the engine efficiency. Yesterday I went for a 215km ride (used 16.6L of fuel), my tune gave me an excellent 7.7L/100KM (30.5 US MPG) Weather was 2 Celsius, 10% Urban, 50% Country road (100km/h), 40% Highway(120km/h) The tune ran great but I still need to touch up the cold SOI map, I had some knocking at low load under deceleration in urban traffic. I will post the file as soon as I got the bugs worked out.

flash7210 · **Posted:** Sat Mar 12, 2016 3:03 pm

wilco549 wrote:

Using OBDwiz to monitor rail pressure, The max pressure I've seen in 21,100 psi at about 3500 rpm. Average around 18,000 psi around 2500 rpm on a short test drive.

Those numbers indicate that there is no problem with the rail pressure sensor or any other components on the high pressure side.

Are you still have the problem with rough running at high rpm?
If so, I think it's a fuel supply problem.

Personally, I would never run my engine above 3000 rpm.

wilco549 · **Posted:** Tue Mar 15, 2016 8:35 am

flash7210 wrote:

wilco549 wrote:

Using OBDwiz to monitor rail pressure, The max pressure I've seen in 21,100 psi at about 3500 rpm. Average around 18,000 psi around 2500 rpm on a short test drive.

Those numbers indicate that there is no problem with the rail pressure sensor or any other components on the high pressure side.

Are you still have the problem with rough running at high rpm?
If so, I think it's a fuel supply problem.

Personally, I would never run my engine above 3000 rpm.

Yes, I've loaded the stage II BIN and, like the stage IV, only get the "miss" but only when I kick down from OD into 3. I'm beginning to think it may be the trans "hunting" for the right gear. It seems like a repetitive miss every 1/2 sec to 1 sec. I did have TC shudder on my new HD TC until I put the RAM TCM on it. The shudder is 99% gone which I suspect is a result of the higher pump pressures the RAM module calls for. I don't recall any "miss" with the stock TCM. Understood on the RPM and only during testing for me.

I suppose the forum police may want me to move this to the CRD, LTT forum?????

Squeeto · **Posted:** Tue Mar 15, 2016 2:03 pm

wilco549 wrote:

I suppose the forum police may want me to move this to the CRD, LTT forum?????

Maybe, but I don't care. If you are sure that the issue is no longer tune related, you would probably do better at LTT.

Squeeto · **Posted:** Tue Mar 15, 2016 2:31 pm

Is it time to start another thread dedicated to unproven tunes?
People could post and/or test the work. Definitely wild west.

kouik · **Posted:** Thu Mar 17, 2016 7:36 pm

Squeeto wrote:

Is it time to start another thread dedicated to unproven tunes?
People could post and/or test the work. Definitely wild west.

I think it would be a good idea, it would certainly keep the clutter to a minimum in this thread.

Speaking of unproven tunes, this is what I was working on lately.

Almost a stock tune in terms of performance but as far as fuel economy I have seen a massive improvement compared to the stock one.
I averaged 28-30 US MPG on my last two trips at highway speeds, (65-70 mph).

What I have modified:

-EGR is disabled, DTC codes for P1140, P0101, P0102 and P0103 all the related codes of having the MAF sensor unplugged has been deleted from ECU
-Air Fuel ratio mixture has been increased 5%
-SOI maps has been advanced in most area and cloned to fool the ecu to only produce one main injection event, only exception is the cold SOI map
-Injection duration maps has been increased slightly (10 points over 12 maps)

It seems to work for me, but please let me know if something is not right or if someone has a trick to increase the economy even more!

Feel free to try this tune, use at your own risk. This tune is for the 808 ECU.

Link:
This tune is for the 808 ECU---https://www.dropbox.com/s/1v0eq03ds7v4xtw/Kouik%27s%20808%20Ecotune.bin?dl=0

This one is for the 811 ECU---https://www.dropbox.com/s/9iczr7ffqgdr0hw/KOUIK%27S%20811%20ECOTUNE.BIN?dl=0

This link is for ECM Titanium---https://www.dropbox.com/s/itavzspverf3o64/ECM%20titanium%201.61%20full.zip?dl=0

flash7210 · **Posted:** Thu Mar 17, 2016 9:06 pm

If you could apply your mods to a 811 tune, I'd be willing to try it.

I havent been able to find a source for downloading ECM titanium.

kouik · **Posted:** Fri Mar 18, 2016 8:56 am

flash7210 wrote:

If you could apply your mods to a 811 tune, I'd be willing to try it.

I havent been able to find a source for downloading ECM titanium.

Take a look at my previous post the 811 file is there now, I also added the ECM Titanium software. Enjoy!
My next step is to make the engine more quiet at idle so I can order my coffee in peace when I stop at Timmy's! :-)r

(Tim Horton's It's a Canadian thing! lol)

gt40freak · **Joined:** Fri May 07, 2010 5:54 pm **Posts:** 76

kouik wrote:

My next step is to make the engine more quiet at idle so I can order my coffee in peace when I stop at Timmy's! :-)r

(Tim Horton's It's a Canadian thing! lol)

Isn't the reason for multiple injections to make the engine more quiet? I don't know much about tuning but I would think if the first shot was just enough fuel to ignite it wouldn't be as loud then the remaining fuel to keep it burning.

kouik · **Posted:** Sat Mar 19, 2016 7:15 am

gt40freak wrote:

kouik wrote:

My next step is to make the engine more quiet at idle so I can order my coffee in peace when I stop at Timmy's! :-)r

(Tim Horton's It's a Canadian thing! lol)

Isn't the reason for multiple injections to make the engine more quiet? I don't know much about tuning but I would think if the first shot was just enough fuel to ignite it wouldn't be as loud then the remaining fuel to keep it burning.

You're absolutly right, it may seem like I'm going in circles but I'm not. Its possible to program the SOI maps so that you only get multiple injection at certain RPM/IQ. Yes it will burn slightly more fuel a idle, but since the engine idles only 750 times per minutes the impact will be small.

Yeti · **Posted:** Sat Mar 19, 2016 1:02 pm

10 point in time of injection do nothing , and leave original the 4th and 5th SOI map it's not useful in standard condiction , ok for the 5% of IQ/air correction but you can do an interpolation for best result , I'm not too expert ,but I never see in one map the SOI map cloned and for what I see you have do to many degrees , It's not an injector pump engine like old Audi and Seat .
remember , you increase the peak pressure and temp , BTW go on with your job :wink:

ps : you have do the SOI map in 3D ?

mass-hole · **Posted:** Tue Mar 22, 2016 8:54 pm

kouik wrote:

Squeeto wrote:

Is it time to start another thread dedicated to unproven tunes?
People could post and/or test the work. Definitely wild west.

I think it would be a good idea, it would certainly keep the clutter to a minimum in this thread.

Speaking of unproven tunes, this is what I was working on lately.

Almost a stock tune in terms of performance but as far as fuel economy I have seen a massive improvement compared to the stock one.
I averaged 28-30 US MPG on my last two trips at highway speeds, (65-70 mph).

What I have modified:

-EGR is disabled, DTC codes for P1140, P0101, P0102 and P0103 all the related codes of having the MAF sensor unplugged has been deleted from ECU
-Air Fuel ratio mixture has been increased 5%
-SOI maps has been advanced in most area and cloned to fool the ecu to only produce one main injection event, only exception is the cold SOI map
-Injection duration maps has been increased slightly (10 points over 12 maps)

It seems to work for me, but please let me know if something is not right or if someone has a trick to increase the economy even more!

Feel free to try this tune, use at your own risk. This tune is for the 808 ECU.

Link:
This tune is for the 808 ECU---https://www.dropbox.com/s/1v0eq03ds7v4xtw/Kouik%27s%20808%20Ecotune.bin?dl=0

This one is for the 811 ECU---https://www.dropbox.com/s/9iczr7ffqgdr0hw/KOUIK%27S%20811%20ECOTUNE.BIN?dl=0

This link is for ECM Titanium---https://www.dropbox.com/s/itavzspverf3o64/ECM%20titanium%201.61%20full.zip?dl=0

I have the same concern as Yeti, why increase the duration maps? As far as I know those are calibrated maps that are determined through flow testing of the injectors. Increasing the duration only throws off the values in the torque maps.

If you need more fueling then increase the Torque during accel map and remove some of the unnecessary columns in the duration maps(like 8500, 9700), shift the remaining columns to the left, and add some more bigger columns onto the end, such as 10000 and 11000 to give you some overhead. Extrapolate from the existing, calibrated, data to give you good estimates of what you will need. 11000 will give you enough fueling to max out the Torque/IQ map which peaks at 450 n-m.

kouik · **Posted:** Tue Mar 22, 2016 9:38 pm

mass-hole wrote:

I have the same concern as Yeti, why increase the duration maps? As far as I know those are calibrated maps that are determined through flow testing of the injectors. Increasing the duration only throws off the values in the torque maps.

If you need more fueling then increase the Torque during accel map and remove some of the unnecessary columns in the duration maps(like 8500, 9700), shift the remaining columns to the left, and add some more bigger columns onto the end, such as 10000 and 11000 to give you some overhead. Extrapolate from the existing, calibrated, data to give you good estimates of what you will need. 11000 will give you enough fueling to max out the Torque/IQ map which peaks at 450 n-m.

I understand Yeti's concerns, but Mass, you got me lost... You say not to touch the duration maps? The 12 duration maps? Or are you talking about the 6 start of injection maps? Because on the new tune I am working on I have not touched the 12 duration maps, but I have been tweaking with the 6 SOI maps. I am not looking for more power, I want to hit 30MPG on the highway. It is my only goal, I doubt that requesting more fuel will help me achieve that. Keep in mind that I want to maintain reliability as well. When you say Torque during accel, do you mean the map loacated at 0E059E?
You say to remove columns in the duration map (8500,9700) I have no such columns in my 12 duration maps??? What do you use to modify your files? I use ECM Titanium and WinOLS. :dizzy:

Yeti · **Posted:** Wed Mar 23, 2016 8:06 am

increase the 12 duartion map in point like in the tune , you fool the ecu ....it's a normal practice but, mass-hole is right the best way is to rescale this map changin the break point and assing the new IQ , 10 point on 1300 point for example is nothing , then at this way leave it original

mass-hole · **Posted:** Wed Mar 23, 2016 12:41 pm

kouik wrote:

mass-hole wrote:

I have the same concern as Yeti, why increase the duration maps? As far as I know those are calibrated maps that are determined through flow testing of the injectors. Increasing the duration only throws off the values in the torque maps.

If you need more fueling then increase the Torque during accel map and remove some of the unnecessary columns in the duration maps(like 8500, 9700), shift the remaining columns to the left, and add some more bigger columns onto the end, such as 10000 and 11000 to give you some overhead. Extrapolate from the existing, calibrated, data to give you good estimates of what you will need. 11000 will give you enough fueling to max out the Torque/IQ map which peaks at 450 n-m.

I understand Yeti's concerns, but Mass, you got me lost... You say not to touch the duration maps? The 12 duration maps? Or are you talking about the 6 start of injection maps? Because on the new tune I am working on I have not touched the 12 duration maps, but I have been tweaking with the 6 SOI maps. I am not looking for more power, I want to hit 30MPG on the highway. It is my only goal, I doubt that requesting more fuel will help me achieve that. Keep in mind that I want to maintain reliability as well. When you say Torque during accel, do you mean the map loacated at 0E059E?
You say to remove columns in the duration map (8500,9700) I have no such columns in my 12 duration maps??? What do you use to modify your files? I use ECM Titanium and WinOLS. :dizzy:

Sorry, your last bullet point said "-Injection duration maps has been increased slightly (10 points over 12 maps)."

I assumed this meant that you increased the injection times within the 12 duration maps to achieve more fuel. ECMTitanium does not have the correct axis data for the X axis, if you look at it in WinOLS it shows injection quantity on the x axis. It ranges from 0 to 9600 on the stock 808 tune:

So what I was saying is you really should not be changing the values in these maps as they are created via actual testing of the injectors at various pressures, so its more of a calibration map. if you want to increase duration/fueling you should remove extraneous columns, maybe the 8700 and 9600 or the 7500 and 8700, and then add 10000 and 11000 columns to the right. You would end up with 7000, 8000, 9600, 10000, 11000. Extrapolate the original duration values for 10000 and 11000 to get proper numbers to put into those columns. You will need to edit the axis data of these maps in the ECMTi hex dump, not the map itself. I use WinOLS to identify the address of the axis values and then search for it in the ECM hex dump to make sure I am adjusting the correct things.

This will give you proper fueling out to 110 mm^3 stroke which is about where the stock Torque to IQ map peaks at for 450n-m. It will allow you to then adjust the Torque during acceleration map in ECMTi to use proper values for the extra fuelling.

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