Learning View Snapshots \ Discussions

[<GB>]

So possibly not stereo noise but maybe too much data being logged...???

[KiDo_Tuning]

I have no idea if the battery has been changed - but the car is 07.

I would be very worried if a 5 year battery meant the ecu is losing power intermittently...

Wouldn't the car have blown by now if that was the case? We're talking 5500- 6400rpm ecu shutdown here, the engine would blow for sure

One guy had a dying battery and bricked his ECU during a flash as it lost power in a 2009 WRX(3 year old battery!). The tactrix draws power from the ECU to power itself. It is/was something I am considering.

The downshifts makes sense as you dont log any knock on acceleration for first few runs but then it appears after I would assume you decelerate a few times

If it shuts fuel off completely, the noise is a 'misfire'

[bigBADbenny]

I have read on RomRaider.com that some ECUs reset on being reflashed and some don't.
I recently did some logging on the stock tune, then reflashed with the latest tune revision.
Apart from the values in the airflow ranges, the only difference was the IAM, stock 0.5/ tune 1.0.

Would it be accurate to say that this indicates that the MY07 ECU is reset on reflashing?


Stock tune above^


Tune revD above^

[dr20t]

Yes Ben

Another indicator that your ecu has been reset on reflash is when you first kick over the motor after reflash it should take 3-4 seconds to start as opposed to ordinarily where it will fire first click

[<GB>]

IAM IN THE FIRST ONE AT .5 I WONDER WHAT WAS GOING ON TO CAUSE THAT? THE A/F LEARNING LOOKED GOOD

[dr20t]

Default Iam is 0.5 after ecu reset

[<GB>]

COOL THANKS

[Rome_BRZ]

COOL THANKS

ALL GOOD MATE

[<GB>]

COOL THANKS

ALL GOOD MATE

ha ha funny, i use caps at work

[Rome_BRZ]

COOL THANKS

ALL GOOD MATE

ha ha funny, i use caps at work

Haha so do people at my work I'm used to getting emails from them in uppercase!

[KiDo_Tuning]

IAM IN THE FIRST ONE AT .5 I WONDER WHAT WAS GOING ON TO CAUSE THAT? THE A/F LEARNING LOOKED GOOD

Since the AF Learnings goal is to maintain stoich, having negative values means the engine needs less fuel to 'find' stoich. So although the MAF scaling is 2% rich in stock form, in tuned form the ECU needs a further 5% less fuel for stoich thus is more energy efficient.

A range would have come down to -7% or so with time too as idle self learns

[<GB>]

IAM IN THE FIRST ONE AT .5 I WONDER WHAT WAS GOING ON TO CAUSE THAT? THE A/F LEARNING LOOKED GOOD

Since the AF Learnings goal is to maintain stoich, having negative values means the engine needs less fuel to 'find' stoich. So although the MAF scaling is 2% rich in stock form, in tuned form the ECU needs a further 5% less fuel for stoich thus is more energy efficient.

A range would have come down to -7% or so with time too as idle self learns

i read that anymore than -5% or +5 on any table in the a/f learning means a possible issue with the maf scaling

http://www.romraider.com/forum/viewtopi ... =33&t=4899

[KiDo_Tuning]

IAM IN THE FIRST ONE AT .5 I WONDER WHAT WAS GOING ON TO CAUSE THAT? THE A/F LEARNING LOOKED GOOD

Since the AF Learnings goal is to maintain stoich, having negative values means the engine needs less fuel to 'find' stoich. So although the MAF scaling is 2% rich in stock form, in tuned form the ECU needs a further 5% less fuel for stoich thus is more energy efficient.

A range would have come down to -7% or so with time too as idle self learns

i read that anymore than -5% or +5 on any table in the a/f learning means a possible issue with the maf scaling

http://www.romraider.com/forum/viewtopi ... =33&t=4899

D range(the 4th one) is the important one, as the value is applied right to the end of the MAF scaling at 5 volts. So if dyno tuned at say 11:1 AFR and D range was at zero, then if the ECU self learns to say 10% in 40+, the final AFR will become 12.4:1 as it trims 10% out of the entire injector pulsewidth from 40g/sec to 5 volts. This also means if the load is 3g/rev on boost and you have 16 degrees ignition timing, the ECU will trim back to 2.7g/rev as well and typically, 2.7g/rev means more ignition timing. More timing + less fuel = issues.

[bass_straitener]

D range(the 4th one) is the important one, as the value is applied right to the end of the MAF scaling at 5 volts. So if dyno tuned at say 11:1 AFR and D range was at zero, then if the ECU self learns to say 10% in 40+, the final AFR will become 12.4:1 as it trims 10% out of the entire injector pulsewidth from 40g/sec to 5 volts. This also means if the load is 3g/rev on boost and you have 16 degrees ignition timing, the ECU will trim back to 2.7g/rev as well and typically, 2.7g/rev means more ignition timing. More timing + less fuel = issues.

Am I correct in saying then that effectively D range is disabled to ensure it doesn't influence the OL fuel trims?

Also if your MAF scaling is within 1% as per the stock tune LV then it would be quite fine as a clogged filter etc would see fuel trims in CL and should have a corresponding and advantageous outcome in OL.

[alessandro132]

Here's mine. Car is mechanically stock 3.0L with an HKS panel filter. Car is running great - no issues

Out of interest, does anyone know why the H6 learning views have the additional row of A/F learning values compared to the H4?