How To: Closed Loop MAF Scaling

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

Are you using the latest logger definition http://www.romraider.com/forum/download/file.php?id=27785

What is you ECUID?

AF learning Value is 15% on idle this mean the car is lean and is compensating 15% of fuel. so you need to increase the MASS Airflow (g/s) on the idle voltage by 15%.

Injen · **Joined:** Fri Apr 07, 2017 3:00 pm **Posts:** 25

welaish wrote:

Are you using the latest logger definition http://www.romraider.com/forum/download/file.php?id=27785

What is you ECUID?

AF learning Value is 15% on idle this mean the car is lean and is compensating 15% of fuel. so you need to increase the MASS Airflow (g/s) on the idle voltage by 15%.

3B42584116
Yes, i have the latest of everything. I'm kinda new to openport since i'm come from PossumLink with my Impreza so there's several new things to learn

If i'm reading Romraider right there's up to 30% at idle that's wrong.

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

Thats strange if you can use the MAF tab this means you can read MAFv and Mass Airflow.

can you send me the list of parameter when you are connected to the car.

so you used to have linkECU on the car? what happened to that?

Injen · **Joined:** Fri Apr 07, 2017 3:00 pm **Posts:** 25

welaish wrote:

Thats strange if you can use the MAF tab this means you can read MAFv and Mass Airflow.

can you send me the list of parameter when you are connected to the car.

so you used to have linkECU on the car? what happened to that?

Sorry if i was unclear.
The car i'm using Openport on is a Forester SG9. The Impreza is a different story

Just noticed that some parameters are there but with a different "name", did just not find them the first try

https://www.imageupload.co.uk/image/Ddyj
https://www.imageupload.co.uk/image/Ddym
https://www.imageupload.co.uk/image/Ddy7
https://www.imageupload.co.uk/image/Ddy9

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

Injen wrote:

Just noticed that some parameters are there but with a different "name", did just not find them the first try

Here you go! all the parameters are available below as per the exact naming.

AF sensor #1
AF correction #1
AF learning #1
Engine load (calculated)
Engine speed
CL/OL Fueling*
Mass Airflow Sensor voltage
Mass Airflow
Throttle opening Angle
Intake air temp
Manifold relative pressure (corrected)
Final Fuel base (2-byte)

dont forget to send me the current MAF scale with the log

enjoy.

Injen · **Joined:** Fri Apr 07, 2017 3:00 pm **Posts:** 25

Hopefully i did evcerything right

LearningView
https://www.imageupload.co.uk/image/Dgeh

Romraider
https://www.imageupload.co.uk/image/Dgey

Rom
http://s000.tinyupload.com/index.php?fi ... 7653411902

Logfile
http://s000.tinyupload.com/index.php?fi ... 7254263045

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

Injen wrote:

Hopefully i did evcerything right

You forgot to log "Mass Airflow Sensor voltage" which is crucial for the scaling.

This MAF scale looks very awkward. you have same values on different voltage range.

Start with this is should work better and dont forget to add the Voltage to the log, do another log with the same conditions after flashing this rom.

Attachment:

Forester_testrun2.bin.zip [270.3 KiB]
Downloaded 361 times

Injen · **Joined:** Fri Apr 07, 2017 3:00 pm **Posts:** 25

welaish wrote:

Injen wrote:

Hopefully i did evcerything right

You forgot to log "Mass Airflow Sensor voltage" which is crucial for the scaling.

Sorry about that.
Here we go again with Forester_testrun2

LearningView:
https://www.imageupload.co.uk/image/Dq1l

Romraider:
https://www.imageupload.co.uk/image/Dq1e

Logfile:
http://s000.tinyupload.com/index.php?fi ... 6253886243

Some changes was made but not much

May i ask how you guys read and understand the logfiles. Trying to learn but can't find any good guide on that part.

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

I guess thats not bad. Taking in mind that the voltage was not logged. You will have better results on next revision then you can start WOT maf scaling. Will get back to you in the next couple of hours.

Sent from my SM-G900FD using Tapatalk

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

My only concern is the IAM which I suspect something is wrong mechanically. If it didn't improve the next revision then you need to visit a mechanic.

Sent from my SM-G900FD using Tapatalk

Injen · **Joined:** Fri Apr 07, 2017 3:00 pm **Posts:** 25

IAM is always low after a flash and i stays low for a long time. Last time i drove 120km until it reached 1.

trez0r · **Posted:** Wed Aug 09, 2017 6:16 pm

You can adjust the initial IAM in rom. Usually it starts at half of it, in your case 0.25 is a quarter, which is suspicious.

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

Yeah then i will fix that in the next revision.

Sent from my SM-G900FD using Tapatalk

Injen · **Joined:** Fri Apr 07, 2017 3:00 pm **Posts:** 25

Thanks guys

welaish · **Joined:** Tue Apr 29, 2014 4:48 am **Posts:** 946

add to the log Fine learning Knock correction and Feedback knock correction.

your initial IAM should be 0.5, since it was reduced to 0.25 this means the car is knocking badly.

I have adjusted the MAF and put the initial to 0.75. do the same thing. Fueling should be closer to zero with this map.

Attachment:

Forester_testrun3.bin.zip [270.31 KiB]
Downloaded 366 times

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How To: Closed Loop MAF Scaling

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