I'll have a chance to test it out tomorrow, but I was planning on doing the same thing..

I think a more clear indication of whether its the closed loop target table is to alter the columns that idle falls into for something like 14.0 and see if it targets that.. If it does, then we know we have the right table..

Like I had said before about the closed loop targets, their not overly useful for adjusting cruise, but if you get tip-in lean conditions, or rolling lean condition (as I do) it does appear that the location of those lean cells falls into the load where my car would be when this occurs on my car.

Since its also an emissions concern, please keep in mind that running leaner than 14.7 or richer, will impact your emissions at idle (if you adjust idle) for the worst... Though most states don't put our cars on the sniffer since the car is exempt from the dyno testing procedures, but I do think there are some states that may require it..

If you have a real lopey idle in closed loop, and you find making the car run richer smooths out the idle, but your fighting it because of closed loop, this is where you would "fix it"

That is assuming we're correct about the function of this table.

 

does this table look correct?

Ever since I did my cams, and raised the idle rpm targets I have had a lean missfire during cold startup right around 1250 - 1500 rpm... what do ya know, that falls right into the area that this maps has leaned out.. 30%-40% load at 1250 - 1500 rpm.

I already moved the probelm area closer to 14.7 this am and the cold start was much better, afr's stayed closer to 14.7 during warmup and the missfire was greatly reduced.

 

Interesting, where did you find that table?

 

Interesting...

 

Not sure who found it, Jack posted some screens back on page 2 post #25. I used the x&y axis from the highoctane ignition map and the data offset 3g mentioned.

I don't have my laptop handy at the moment, but I will post a clear screeny of the table def shortly.

 

So far there has been some mixed results from this table.. we're still not 100% sure this is anything we think it is.. But its encouraging..

 

well you pulled out the right table, but its incorrect.
remember how you deleted the 70 and 90 load tables. well, you then have to move over the lean spots on the table.

 

The offset is correct 3ff5 the axis are load and rpm and swap x-y From his pic he has it correct.

 

Good memory man, yeah, I was thinking about that when I first looked at it. I will compair it with my stock rom and adjust as needed.

So far it does seem to be doing what it should, but that could just be placebo affect

 

i now have a preliminary closed loop def of the 03-06 roms mapped out...but there are some idiosyncracies between years, especially the evo ix's...i'll try to post more once i sort and test them out...

 

After checking the scalings and maps, i believe this is the 1/3 Closed Loop Maps for EVO IXs..

note: i'm not sure why the first value is at 94.1, still need to test it out and look at the rom code again.

 

You may be one off in your offset.


Eric

 

has anybody tested the closed loop fuel map for the evo 8 yet?

 

Hi Guys,

I've been doing a lot of disassembly work on the Australian Evo IX ECU, and I have also located closed loop fuel maps. Well, at the moment I am assuming they are closed loop fuel maps - I have also seen them labelled anti lag maps.

Anyway, there are 3 of the maps. The values are identical between maps, but there are 3 distinct locations.

I am fitting my LC1 wideband in the next couple of weeks and will be doing some testing trying to verify if changes to these maps change the closed loop AFR reading.

Just thought you might like to know that there are 3 maps...

Their ECUFlash definitions are:

<table name="? Closed Loop Fuel Map #1" category="Undefined" address="3AA9" type="3D" swapxy="true" scaling="AFR">
<table name="Load" address="7034" type="X Axis" elements="21" scaling="Load" />
<table name="RPM" address="7002" type="Y Axis" elements="20" scaling="RPM" />
</table>

<table name="? Closed Loop Fuel Map#2" category="Undefined" address="5811" type="3D" swapxy="true" scaling="AFR">
<table name="Load" address="7034" type="X Axis" elements="21" scaling="Load" />
<table name="RPM" address="7002" type="Y Axis" elements="20" scaling="RPM" />
</table>

<table name="? Closed Loop Fuel Map #3" category="Undefined" address="5D21" type="3D" swapxy="true" scaling="AFR">
<table name="Load" address="7034" type="X Axis" elements="21" scaling="Load" />
<table name="RPM" address="7002" type="Y Axis" elements="20" scaling="RPM" />
</table>

Through my disassembly, I am also quite confident of the axis definitions.

Brendan

 

Brendan what are the hex locations in the Oz ECU?