Learning View (version 0.4a 10-31-08)

Bullwinkle1983 · **Joined:** Sat Dec 16, 2006 1:59 pm **Posts:** 143

Well, the first thing you need to do is scale your MAF. The car has a large AF learning D, which is brought over into open loop. Once you get the MAF scaled appropriately, I would just start pulling some timing from the cells that have large (over 1) negative FBKC.

renew · **Joined:** Fri Jun 13, 2008 5:49 pm **Posts:** 32

thanks for your reply. But I am not quite sure how to approach the MAF scaling!

At first what do values <0 (as it is in my case) mean? There is actually more entering the engine air than expected/measured or less?
How is the ECU determining these values? (measuring the AFR/lambda value of the stock lambda sensor in closed loop?)

thank you very much!

90eclipsegsx · **Joined:** Tue Mar 11, 2008 4:18 am **Posts:** 25

Please provide input/suggestion on my log. Thanks

Bullwinkle1983 · **Joined:** Sat Dec 16, 2006 1:59 pm **Posts:** 143

Looks like you need to remove a little timing throughout the WOT range, especially up top.

90eclipsegsx · **Joined:** Tue Mar 11, 2008 4:18 am **Posts:** 25

Bullwinkle1983 wrote:

Looks like you need to remove a little timing throughout the WOT range, especially up top.

Thanks for the input. I have trimming down A/F Learning down some, let see what the value will be on the next log. So far it looks good to me, I'll give it another day or two letting the ECU learning the new value.

HOLLYW00D · **Joined:** Thu Sep 20, 2007 10:31 am **Posts:** 48

merchgod wrote:

06rexwagon wrote:

How did you change the ranges?

You change the ranges in RomRaider ("Fine Correction Columns (Load)" and "Fine Correction Rows (RPM)").

i have done this to my rom and still the learning view tool shows factory values. any ideas?

merchgod · **Joined:** Wed Mar 29, 2006 10:38 pm **Posts:** 4224

HOLLYW00D wrote:

i have done this to my rom and still the learning view tool shows factory values. any ideas?

Learning View can't read the axis values because your ECU does not allow it (due to its placement in the ROM). This impacts primarily 04 models with the 32-bit ECU. What you need to do is copy your current tune to the same directory as learning view and rename it "tune.hex". Learning view will then look to that rom for the axis values.

BBBsti LTD · **Joined:** Sat Mar 17, 2007 8:02 pm **Posts:** 25

Here is my learning view, what can be causing my -17.90 A/F Learning#1?? My cars seems to be running fine, the only thing is that in the morning when the car is cold when the RPMs are around 2000 while warm up if I REV / blip the throttle I hear pops from the exhaust (like unburnt fuel) and then when the rpms go down to normal operating temp, no more pops. It is only during the cold start.

Also I know that what the -17.90 is that the ECU is removing gas from that area, but what are the +/- of this. What is "better" having + corrections or - corrections??

FYI the ECU was reseted more than 700 miles ago, maybe more.

Quote:

CAL ID:A2UJ000J
Description: 07 USDM Impreza STi MT
ECU ID:4D12784206

IAM 1.0000

A/F Learning #1:
0 - <5.60 5.60 - <10.00 10.00 - <40.00 40.00+
-17.90 -5.10 -2.00 -0.30

FLKC Table 0 - <0.90 0.90 - <1.40 1.40 - <2.20 2.20 - <3.50 3.50+
0 - <2400 0.00 0.00 0.00 0.00 0.00
2400 - <3400 0.00 0.00 0.00 0.00 0.00
3400 - <4000 0.00 0.00 0.00 0.00 0.00
4000 - <5600 0.00 0.00 0.00 0.00 0.00
5600 - <6000 0.00 0.00 0.00 0.00 0.00
6000 - <7600 0.00 0.00 0.00 0.00 0.00
7600+ 0.00 0.00 0.00 0.00 0.00

NSFW · **Joined:** Wed Nov 22, 2006 10:23 pm **Posts:** 397

BBBsti LTD wrote:

Here is my learning view, what can be causing my -17.90 A/F Learning#1?? My cars seems to be running fine, the only thing is that in the morning when the car is cold when the RPMs are around 2000 while warm up if I REV / blip the throttle I hear pops from the exhaust (like unburnt fuel) and then when the rpms go down to normal operating temp, no more pops. It is only during the cold start.

Also I know that what the -17.90 is that the ECU is removing gas from that area, but what are the +/- of this. What is "better" having + corrections or - corrections??

FYI the ECU was reseted more than 700 miles ago, maybe more.

Quote:

A/F Learning #1:
0 - <5.60 5.60 - <10.00 10.00 - <40.00 40.00+
-17.90 -5.10 -2.00 -0.30

I'm guessing your injector latency is too high - the injector ends up squirting more fuel than the ECU expected, so it reduces the the pulse width to compensate for that. That's also consistent with the fact that the error gets smaller as the flow gets higher. However when you fix the latency you'll throw off the others a bit as well, so expect to make a few iterations to get it dialed in.

Did you install larger injectors at some point, and tune the scaling but not the latency?

brocksdad · **Posted:** Wed Aug 27, 2008 4:05 pm

Here's mine. ECU was reset about 75 miles ago.

ls1dreams · **Joined:** Sat May 10, 2008 3:01 pm **Posts:** 25

Anyone having trouble connecting?

I'm using a 1.3m tactrix cable and can log w/ romraider and download my ROM with ECUflash.

Unfortunately, the learning view tool won't connect. (It sees the cable on COM14).

Any ideas?

Do the diagnostic cables need to be connected? (I believe I tried it while they were still attached)

merchgod · **Joined:** Wed Mar 29, 2006 10:38 pm **Posts:** 4224

ls1dreams wrote:

Unfortunately, the learning view tool won't connect. (It sees the cable on COM14).

That's your problem right there. It doesn't detect the cable. You have to manually select the correct com port from the drop down box which will be the same as the one you use for romraider.

ls1dreams · **Joined:** Sat May 10, 2008 3:01 pm **Posts:** 25

merchgod wrote:

ls1dreams wrote:

Unfortunately, the learning view tool won't connect. (It sees the cable on COM14).

That's your problem right there. It doesn't detect the cable. You have to manually select the correct com port from the drop down box which will be the same as the one you use for romraider.

I think you misunderstood... I picked that same com port as romraider and it still wouldn't connect. I'm hoping it's just an issue of the diag. cables. I was just commenting that COM14 DOES show up, so it's not like it wasn't an option for me.

HOLLYW00D · **Joined:** Thu Sep 20, 2007 10:31 am **Posts:** 48

try with the test connector(s) disconnected. i don't connect my test connector to user the learningview tool.

merchgod · **Joined:** Wed Mar 29, 2006 10:38 pm **Posts:** 4224

It should still work in test mode, but you shouldn't be in test mode unless you are using Ecuflash to read or flash the ECU.

When it fails, click on "view log", copy and send it in a PM to me.

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