ECU ROM mod - double the "Fuel Cut Load Limit" range to 638
Dan
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From: Tri-Cities, WA // Portland, OR
on a maf based efi, units for load are somewhat arbitrary. the early ecuflash defs mixed using %, kpa, and "load" for the unit name. same scaling for all three. i went with %.
for 90550001 should it be 4d00 or 4000 ???
ECU ROM mod - Double the "Fuel Cut Load Limit" table range to 638 load
October 11, 2009 - Added 90550001 ROM.
EDM Evo 7 Ralliart - 90550001
1) Add the items between the "-----" to your ROM xml file.
-----
<table name="EXTU.W->SHLL (600D -> 4000) for Fuel Cut Load X2" category="Turbo Mods" address="11ac6" type="1D" level="1" scaling="Hex16"/>
<scaling name="FuelCutLoadX2" units="%" toexpr="x*5/2" frexpr="x*2/5" format="%.0f" min="0" max="638" inc="1" storagetype="uint8" endian="big"/>
<table name="Fuel Cut Load X2" category="Turbo Mods" type="2D" level="2" address="3814" scaling="FuelCutLoadX2">
<table name="RPM" type="Y Axis" elements="9" address="56b6" scaling="RPM"/>
</table>
<table name="Fuel Cut Load Trigger Delay" category="Turbo Mods" type="1D" address="159a" level="1" scaling="Time"/>
-----
October 11, 2009 - Added 90550001 ROM.
EDM Evo 7 Ralliart - 90550001
1) Add the items between the "-----" to your ROM xml file.
-----
<table name="EXTU.W->SHLL (600D -> 4000) for Fuel Cut Load X2" category="Turbo Mods" address="11ac6" type="1D" level="1" scaling="Hex16"/>
<scaling name="FuelCutLoadX2" units="%" toexpr="x*5/2" frexpr="x*2/5" format="%.0f" min="0" max="638" inc="1" storagetype="uint8" endian="big"/>
<table name="Fuel Cut Load X2" category="Turbo Mods" type="2D" level="2" address="3814" scaling="FuelCutLoadX2">
<table name="RPM" type="Y Axis" elements="9" address="56b6" scaling="RPM"/>
</table>
<table name="Fuel Cut Load Trigger Delay" category="Turbo Mods" type="1D" address="159a" level="1" scaling="Time"/>
-----
Last edited by todd6027; Apr 29, 2011 at 05:30 AM.
Thread Starter
EvoM Guru
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From: Tri-Cities, WA // Portland, OR
8858xxxx
<table name="EXTU.W->SHLL (6DDD -> 4D00) for Fuel Cut Load X2" category="Turbo Mods" address="14854" type="1D" level="1" scaling="Hex16"/>
<scaling name="FuelCutLoadX2" units="%" toexpr="x*5/2" frexpr="x*2/5" format="%.0f" min="0" max="638" inc="1" storagetype="uint8" endian="big"/>
<table name="Fuel Cut Load X2" category="Turbo Mods" type="2D" level="1" address="3050" scaling="FuelCutLoadX2">
<table name="RPM" type="Y Axis" elements="9" address="77ae" scaling="RPM"/>
</table>
<table name="Fuel Cut Load Trigger Delay" category="Turbo Mods" type="1D" address="119a" level="1" scaling="Time"/>
<table name="EXTU.W->SHLL (6DDD -> 4D00) for Fuel Cut Load X2" category="Turbo Mods" address="14854" type="1D" level="1" scaling="Hex16"/>
<scaling name="FuelCutLoadX2" units="%" toexpr="x*5/2" frexpr="x*2/5" format="%.0f" min="0" max="638" inc="1" storagetype="uint8" endian="big"/>
<table name="Fuel Cut Load X2" category="Turbo Mods" type="2D" level="1" address="3050" scaling="FuelCutLoadX2">
<table name="RPM" type="Y Axis" elements="9" address="77ae" scaling="RPM"/>
</table>
<table name="Fuel Cut Load Trigger Delay" category="Turbo Mods" type="1D" address="119a" level="1" scaling="Time"/>
Evolving Member
Joined: Oct 2010
Posts: 175
Likes: 1
From: Sydney
i just added the above to my 88580014 XML and when i load the ROM, the 'Fuel Cut Load X2' table is all set to 540. though the EXT.U table is still at 6DDD.
Even at 6DDD i can set the table to 638 too
is that correct?
Even at 6DDD i can set the table to 638 too
is that correct?
yes, although you should have copied original values from "fuel cut load" table somewhere before you insert that xml. table is in the same location with x1 load cut, so please be sure that you don't mix it.
Thank you for this mod, and as a bump to note it is not included (that I saw) in v7 ROMs for 8858. Since I run 320 peak load on my existing SD tune, I obviously would like to have a little headroom 
Evolving Member
Joined: Jul 2007
Posts: 172
Likes: 1
From: Australia
Sorry to bump an old thread again, but I was just checking these settings on a rom I've been using and I can't work out how the car hasn't been getting fuel cut all the time!
Basically I've tuned the car well into 240-260 (1byte) load, yet the rom is configured to use Fuel Cut Load x1 which should only allow about 160-185 load if I am reading correctly?
Is this just because my trigger delay is set too long? I was just checking my logs and a 3rd gear WOT tuning pull shows load above those Fuel Cut Load x1 maximums for at least 4 seconds, so it just doesn't sound right to me...
Or is the trigger delay reset each rpm range it passes through?? So it allows 3 seconds above the load limit at 5500, then another 3 seconds at 6000 etc.
Basically I've tuned the car well into 240-260 (1byte) load, yet the rom is configured to use Fuel Cut Load x1 which should only allow about 160-185 load if I am reading correctly?
Is this just because my trigger delay is set too long? I was just checking my logs and a 3rd gear WOT tuning pull shows load above those Fuel Cut Load x1 maximums for at least 4 seconds, so it just doesn't sound right to me...
Or is the trigger delay reset each rpm range it passes through?? So it allows 3 seconds above the load limit at 5500, then another 3 seconds at 6000 etc.
Last edited by Eisen7; Aug 1, 2013 at 10:41 PM.