MAF(Limit) E2VG212E, help needed.

crippsdr · **Posted:** Mon Jun 02, 2014 12:00 pm

Will this rom flash onto my ecu?
2006 USDM Subaru Forester 2.5i MT/AT E2VG212D 4212087006

It has the traditional knock control logic where mine does not.

Current ecu
2006 ADM Subaru Forester 2.5 MT/AT E2VG212E 4252187006

crippsdr · **Posted:** Sun Jul 27, 2014 3:51 am

Can someone define "Feedback Correction Negative Advance Delay" for me. I'm at a loss finding it.
It seems to never advance the timing after 4000rpm if it has one since knock event.

td-d · **Posted:** Sun Jul 27, 2014 9:09 am

I think this is the address: C9197

crippsdr · **Posted:** Sun Jul 27, 2014 10:02 pm

td-d wrote:

I think this is the address: C9197

Thanks.
Delay of 8196.. Ill change it to 125 (seems to be the standard) and see if that speeds things up.
Thanks Yet again.

td-d · **Posted:** Mon Jul 28, 2014 7:18 pm

crippsdr wrote:

td-d wrote:

I think this is the address: C9197

Thanks.
Delay of 8196.. Ill change it to 125 (seems to be the standard) and see if that speeds things up.
Thanks Yet again.

Careful - the delay is a byte value in your rom, not a word value - should be 32:

ROM:000C9197 Feedback_Correction_Negative_Advance_Delay:.data.b h'20

Use 'counterthreshold' as opposed to counterthreshold1 - should sort it.

crippsdr · **Posted:** Tue Jul 29, 2014 8:57 am

td-d wrote:

crippsdr wrote:

td-d wrote:

I think this is the address: C9197

Thanks.
Delay of 8196.. Ill change it to 125 (seems to be the standard) and see if that speeds things up.
Thanks Yet again.

Careful - the delay is a byte value in your rom, not a word value - should be 32:

ROM:000C9197 Feedback_Correction_Negative_Advance_Delay:.data.b h'20

Use 'counterthreshold' as opposed to counterthreshold1 - should sort it.

Ah ok. Can i compare these between ecu's? I have changed it, seems to have no influence.
Could this be the wrong address?

td-d · **Posted:** Tue Jul 29, 2014 2:40 pm

Logic seems fairly consistent on this part in comparison to a 'normal' rom...

crippsdr · **Posted:** Wed Aug 13, 2014 1:09 am

Hey can someone point me in the right direction for finding minimum pulse width.

dschultz · **Posted:** Wed Aug 13, 2014 3:14 am

crippsdr wrote:

Hey can someone point me in the right direction for finding minimum pulse width.

I think this might be it, in microseconds

Code:

ROM:0002AC90 44160000 flt_2AC90: .float 600.0 (or 0.6 milliseconds)

crippsdr · **Posted:** Wed Aug 13, 2014 9:55 pm

dschultz wrote:

crippsdr wrote:

Hey can someone point me in the right direction for finding minimum pulse width.

I think this might be it, in microseconds

Code:

ROM:0002AC90 44160000 flt_2AC90: .float 600.0 (or 0.6 milliseconds)

Thanks heaps. Seems to have fixed my issue.

mrf582 · **Posted:** Wed Sep 03, 2014 7:49 pm

td-d wrote:

I believe I've found it. Check out this table:

Code:

ROM:0007EB88 Table_EngineLoad_MAX?:.data.w h'11      ; DATA XREF: Func_Test_MAF_limits+144o
ROM:0007EB88                                         ; Func_Test_MAF_limits:off_20E68o
ROM:0007EB8A                 .data.w h'800
ROM:0007EB8C                 .data.l flt_C1B20
ROM:0007EB90                 .data.l word_C1B64      ; = 9.7e-1
ROM:0007EB94                 .float 0.000061035156
ROM:0007EB98                 .float 0.0

The values are engine load maximum figures (against an ECT axis) - and they correlate to your logs, which max out at 1.2 load. Further in the routine, 0.2 load is subtracted from the calculated load figure - which gives you 1.2 at normal engine temperature. The scaling is also consistent with engine load.

These are the values in the table:

Code:

ROM:000C1B64 word_C1B64:     .data.w h'3E14          ; DATA XREF: ROM:0007EB90o
ROM:000C1B64                                         ; = 9.7e-1
ROM:000C1B66                 .data.w h'3E66          ; = 9.75e-1
ROM:000C1B68                 .data.w h'3F0A          ; = 9.85e-1
ROM:000C1B6A                 .data.w h'40A4          ; = 1.01
ROM:000C1B6C                 .data.w h'428F          ; = 1.04
ROM:000C1B6E                 .data.w h'4333          ; = 1.05
ROM:000C1B70                 .data.w h'4385          ; = 1.055
ROM:000C1B72                 .data.w h'4666          ; = 1.1
ROM:000C1B74                 .data.w h'4666          ; = 1.1
ROM:000C1B76                 .data.w h'4A8F          ; = 1.165
ROM:000C1B78                 .data.w h'4A8F          ; = 1.165
ROM:000C1B7A                 .data.w h'4D71          ; = 1.21
ROM:000C1B7C                 .data.w h'599A          ; = 1.4
ROM:000C1B7E                 .data.w h'599A          ; = 1.4
ROM:000C1B80                 .data.w h'599A          ; = 1.4
ROM:000C1B82                 .data.w h'599A          ; = 1.4
ROM:000C1B84                 .data.w h'599A          ; = 1.4

Bump up the thresholds, and see if that works.

Can you tell me the address of this table for another 2.5i N/A ROM? A friend of mine put a TD04 on his car and I'm experiencing the same lean fueling under boost situation.

Is it at C1C18? I did a search for 59 9A 59 9A 59 9A 59 9A 59 9A and found this location. But I wonder if there is table length is 1 more than the original one in this thread?

Thanks!

td-d · **Posted:** Wed Sep 03, 2014 7:55 pm

Sure - what's the CAL id?

mrf582 · **Posted:** Wed Sep 03, 2014 7:56 pm

Thanks! I just edited my post.

E2UE102L - 2.5i USDM Impreza

td-d · **Posted:** Wed Sep 03, 2014 8:20 pm

Here you go, you can use the engine load limit B table definition, just note the axis is 19 cells (not 2 like the default table):

Code:

ROM:0008DBE8 Table_Engine_Load_Limit_B_Maximum_RPM:.data.w h'13 
ROM:0008DBEA                 .data.w h'800
ROM:0008DBEC                 .data.l flt_C1BC8
ROM:0008DBF0                 .data.l word_C1C14      ; = 1.02
ROM:0008DBF4                 .float 0.000061035156
ROM:0008DBF8                 .float 0.0

mrf582 · **Posted:** Wed Sep 03, 2014 9:22 pm

Thank you Sir!

For anyone else needing this in the future, copy/paste this into the XML file for E2UE102L

Code:

<table name="Engine Load Limit B Maximum (RPM)" address="c1c14">
<table name="Y" address="c1bc8" elements="19"/>
</table>

RomRaider

MAF(Limit) E2VG212E, help needed.

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