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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Wed Feb 21, 2024 3:39 am 
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Joined: Wed Feb 14, 2024 4:05 am
Posts: 2
anyone have any idea why the Overrun Enrich RPM Delta value never saves? I'll change it to -17, but it always comes up as 1400.

AE5L500L


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Thu May 02, 2024 5:22 am 
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Joined: Sat Jun 25, 2022 3:58 am
Posts: 11
Anyone know if these tables can be used to fix a lean spike during WOT shifts on an automatic 4eat 2004 Forester XT? I've got the tables added to my romraider definition, so I'll probably test it regardless. I'm just not sure if the fuel cut during shifts uses any of the same data from these tables or not...

During every WOT shift I see a lean spike for a split second and get a small amount of FBKC at the same time which I'm guessing is because it's going lean during shifts while in boost.

My first instinct would be to increase the Overrun Initial Enrichment (currently at 2.4ms stock with oem injectors), which should spray a little more fuel right before the injectors cut off during shifts as well (hopefully).


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Thu May 02, 2024 2:23 pm 
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Joined: Sat Jun 22, 2019 8:31 am
Posts: 67
bluegizmo83 wrote:
Anyone know if these tables can be used to fix a lean spike during WOT shifts on an automatic 4eat 2004 Forester XT? I've got the tables added to my romraider definition, so I'll probably test it regardless. I'm just not sure if the fuel cut during shifts uses any of the same data from these tables or not...

During every WOT shift I see a lean spike for a split second and get a small amount of FBKC at the same time which I'm guessing is because it's going lean during shifts while in boost.

My first instinct would be to increase the Overrun Initial Enrichment (currently at 2.4ms stock with oem injectors), which should spray a little more fuel right before the injectors cut off during shifts as well (hopefully).


It does not help, there is some hardcoded injectors cut off on EAT shifts and would also like to know how to change that, prefferably change that to spark cut :roll:

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2006 FXT EJ255 / 4EAT / Comp Turbo CTR-X475 / FMIC / Flex E30

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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Thu May 02, 2024 5:50 pm 
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Joined: Sat Jun 25, 2022 3:58 am
Posts: 11
25fxti wrote:

It does not help, there is some hardcoded injectors cut off on EAT shifts and would also like to know how to change that, prefferably change that to spark cut :roll:


Well that sucks. Maybe one day somebody will find that piece of code in the ECU somewhere too. Thanks for the response though!


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Fri Jul 05, 2024 5:02 am 
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Joined: Mon Apr 15, 2024 3:21 am
Posts: 28
Did anyone ever find any Decel fuel shutoff settings for the EZ30 (6 Cylinder) models?

Working on D0XJ001M, I think I have located the Negative Delta and Initial Enrichment, but I'm having to follow along in wols here, as I never got Ghidra to work properly.

In my case, where I seem to have located the RPM offset to start DFSO (c484c), it is actually -100, rather than -17 as is common for the 4 Cylinders thus far. Also, there are only two RPM values where I expected to see 3 for the timer values, 1800 and 5000 RPM @ (c48bc). Immediately after those values is the RPM limit which seems to be the norm.

No idea if any of this is correct, as you might imagine I don't have any xrefs or readable code of any kind. Purely trying to locate sane values that meet the criteria here based on pure logical thinking and what I have seen so far.

So far, I've had 0 luck locating the resume RPM vs ECT function.


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Fri Jul 05, 2024 8:01 am 
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Joined: Sun Oct 26, 2014 6:59 pm
Posts: 246
Location: Russia
MidnightTuning wrote:
Did anyone ever find any Decel fuel shutoff settings for the EZ30 (6 Cylinder) models?

Working on D0XJ001M, I think I have located the Negative Delta and Initial Enrichment, but I'm having to follow along in wols here, as I never got Ghidra to work properly.

In my case, where I seem to have located the RPM offset to start DFSO (c484c), it is actually -100, rather than -17 as is common for the 4 Cylinders thus far. Also, there are only two RPM values where I expected to see 3 for the timer values, 1800 and 5000 RPM @ (c48bc). Immediately after those values is the RPM limit which seems to be the norm.

No idea if any of this is correct, as you might imagine I don't have any xrefs or readable code of any kind. Purely trying to locate sane values that meet the criteria here based on pure logical thinking and what I have seen so far.

So far, I've had 0 luck locating the resume RPM vs ECT function.


ROM:000C48BC Overrun_Fueling_Cut_Counter_RPM_Threshold_Low_Data:.float 1800.0
ROM:000C4890 Overrun_Fueling_Cut_Counter_RPM_Threshold_Med_Data:.float 3600.0
ROM:000C48C0 Overrun_Fueling_Cut_Counter_RPM_Threshold_High_Data:.float 5000.0
ROM:000C484C Overrun_Enrich_RPM_Delta_Activation1_Data:.float -100.0
ROM:000C4850 Overrun_initial_injector_enrichment__pulsewidth_1_Data:.float 3240.0


Overrun Fueling RPM Resume Threshold
rows count="16" offset="#C498C"
data offset="#C595A"

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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Mon Jul 15, 2024 3:21 am 
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Joined: Mon Apr 15, 2024 3:21 am
Posts: 28
cortin wrote:
MidnightTuning wrote:
Did anyone ever find any Decel fuel shutoff settings for the EZ30 (6 Cylinder) models?

Working on D0XJ001M, I think I have located the Negative Delta and Initial Enrichment, but I'm having to follow along in wols here, as I never got Ghidra to work properly.

In my case, where I seem to have located the RPM offset to start DFSO (c484c), it is actually -100, rather than -17 as is common for the 4 Cylinders thus far. Also, there are only two RPM values where I expected to see 3 for the timer values, 1800 and 5000 RPM @ (c48bc). Immediately after those values is the RPM limit which seems to be the norm.

No idea if any of this is correct, as you might imagine I don't have any xrefs or readable code of any kind. Purely trying to locate sane values that meet the criteria here based on pure logical thinking and what I have seen so far.

So far, I've had 0 luck locating the resume RPM vs ECT function.


ROM:000C48BC Overrun_Fueling_Cut_Counter_RPM_Threshold_Low_Data:.float 1800.0
ROM:000C4890 Overrun_Fueling_Cut_Counter_RPM_Threshold_Med_Data:.float 3600.0
ROM:000C48C0 Overrun_Fueling_Cut_Counter_RPM_Threshold_High_Data:.float 5000.0
ROM:000C484C Overrun_Enrich_RPM_Delta_Activation1_Data:.float -100.0
ROM:000C4850 Overrun_initial_injector_enrichment__pulsewidth_1_Data:.float 3240.0


Overrun Fueling RPM Resume Threshold
rows count="16" offset="#C498C"
data offset="#C595A"


Cortin, you're a legend. Thanks for confirming my theory, seems I was so close haha.


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Thu Mar 27, 2025 1:04 am 
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Joined: Sat Aug 24, 2024 6:17 pm
Posts: 34
AE5I910V


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Sun May 11, 2025 2:57 pm 
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Joined: Sat Aug 24, 2024 6:17 pm
Posts: 34
anyone have addresses for overrun ipw initial at minimum would like all but that would be minimum with injector change
Ive got xmls from cobb pro tune software but they change the language so i cant read them as they are if anyone can use and convert i can send if u can give me 2011 defs xml for tables


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Tue Jul 01, 2025 10:51 pm 
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Joined: Tue Jan 24, 2017 1:28 am
Posts: 88
Location: Coffs, AUS
I've been digging through the logic that uses the RPM threshold counters table as it's the only function that I'm aware of that uses it. I think I've worked out the tables that hold the counter values for each tier but wanted to confirm what the values themselves would be.
(A8DH200V - Function at 3092c)

I believe the counter tables that are used are gear based then indexed by the RPM threshold tier. Real observations seem to respond similarly to the table values (Ie. Lower RPM seems to hang longer in each gear than the upper ranges *Except 1st which seems to be a blanket fallback)
See values and table addresses in screenshot below.

My only question is, what could the raw values be? ms seems too low but can't see any multipliers other than maybe a clamp?
Additionally, how do these work alongside the overrun RPM delta table? Does that fire after the count has completed?

I'm going to play with the values and will dig further...


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Wed Nov 05, 2025 8:41 pm 
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Joined: Wed Nov 05, 2025 8:27 pm
Posts: 1
Hey, a little late to the party, but one can dream.
Could anyone provide overrun tables for A2TB001C?


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 Post subject: Re: Deceleration Fueling / Overrun RPM cutoff threshold tabl
PostPosted: Sat Jan 31, 2026 3:24 am 
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Joined: Fri Mar 07, 2008 3:29 pm
Posts: 55
Anyone ever find this for USDM 2005 FXT (A2WC412I)?

Got DimeMod recently and car almost dies when throwing in the clutch, but I think I can fix that by setting the target throttle plate position to ~2% at 800 - 1600 RPM with 0 requested torque. That's how I did it when my car had an 04 ECU but the 04 also rev-hanged more and had overrun tables (04 STI merpmod rom modded by Andea). I will try it on the 05 and update this post, but just wanted to put the feeler out there in case someone has found it already for this rom.

Thanks!

UPDATE: Not looking good for the DBW work-around. When throwing it in neutral, it still shuts off the injectors until RPMs dip into the 600s. I'll keep trying but am open to ideas. Pretty sure I need the overrun fueling tables though.

UPDATE 2: Now that my VE table is more accurate, it recovers from the drop to 500-600 rpm pretty well and isn't as annoying.

I am offering up $50 to anyone that can get the fuel overrun tables for this rom.
I tried to do it with the required expensive software, but the instructions given were missing some vital steps and I couldn't figure them out.


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