RomRaider

A2ZJ500M

ALPHA_Overrun_Enrich_RPM_Delta_Activation 0x5E12C
ALPHA_Overrun_Fueling_Cut_Counter_RPM_Threshold 0x5E15C
ALPHA_Overrun_initial_injector_enrichment__pulsewidth_ 0x5E130

Table_ALPHA_Overrun_Fueling_RPM_Resume_Threshold: size 16
Y_Axis 0x5E24C
Data 0x5ED5C

Update this is what the Overrun RPM cutoff threshold table looks like in ScoobyRom on the 2008 H6, at least on a JDM 3.0R.

Sorry to dig up an old post but does anyone know the fuel overrun addresses for an e2vl001b ecu? This information will be GREATLY appreciated.

Post your original rom please. I don't see your rom in the Stock Rom List

Here you go.

Just curious but what programs do you use to pull ecu def addresses?

Once the table has been created how are they saved? I have loaded it into ECUflash but am unable to SAVE the XML. It never has the Overrun when I restart the program.

have you done the "same rom as" button? are sure you're loading the new edited rom instead of the original?

I'm attempting to wrap my head around the 4 tables for OverRun on my 2011 STI. I read through this thread a couple times and am still looking for some help.

https://imgur.com/a/HIWyPUv
https://imgur.com/a/HIWyPUv

My car runs rich every time I let off the throttle, even if I'm just putting around. I understand Overrun a little, but let me go over each of the 4 tables and see if someone can help clear up any confusions:

1) Overrun Fueling RPM Resume Threshold:
The description says "at what RPM the injectors switch back on from coasting". I saw with older GD ROMs, these values made sense, but for my car they do not. I suspect that on the GR, those values are actually "RPMs above Idle Speed RPM target". I see the injectors kick back on at ~1000 RPM and my idle is set to 800 - 850 RPM.

2) Overrun Enrich RPM Delta:
This is the required overrun delta before the overrun enrichment is activated. I believe I understand this - if RPMs drop 17 in one monitoring cycle, it enters Overrun mode. So entering overrun is determined by RPMs dropping, not the TPS like I had assumed. I could set this "higher" like -14 to make it enter overrun easier, but I haven't tried this yet.

3) Overrun initial injector enrichment (pulsewidth):
Since I have bigger injectors (1065cc), I turned this down a couple times, to 0.8ms and then 0.25ms. I thought this would be an enrichment used when the injectors come back on at low RPM, but mastermind forum member "td-d" says "it's the first firing just before injector switch off - i.e. tip out". This makes me think I want to set this to negative numbers because my car always goes rich when I let off the throttle, even when it's a fairly gentle. I will try reducing this value but am curious what others have to say.

4) Overrun Fueling Cut Counter RPM Threshold:
This table confuses me. The description says "These counters determine the RPM count before injectors cut off during overrun"
Is this a counter of RPM delta, like let's say my car is doing -20 RPM per cycle, to hit the 2500 RPM counter it will take 125 cycles to enter the Low threshold? Or are these just thresholds of RPM that are user by counters to vary between low med + high? td-d says the latter and I tend to agree, but am still researching. Awhile back, I tried raising the values but now I think that was a bad idea. I had 2200/3100/4500. When in the low range, it did seem to take longer to cut the injectors, like a full second. When RPMs are higher, it would cut them quicker. Medium seems like ~300ms and High more like 100ms. I'm logging in the slower KLINE mode so I get about 9 samples a second. I might log in SSM mode and get 40 per second to get better resolution on this overrun stuff. But maybe just set these values much lower so it's always in the High mode?

Thanks all!

1) on my GR, it is very accurate for "RPMs which the Overrun fueling will resume", and not a delta from the idle.

2) Exactly, not only 0% TPS is used for Overrun calculation, RPMs dropping also counts for the result of entering Overrun.

3) It appears to be Tip-out as td-d mentioned. I had a lot of fire in the exhaust with 1400cc injectors and keeping that table stock. I eventually had to set it to 0.25ms aswell. I still have a few "fire" issues, but not as frequent now. But perhaps it might have a play on "enrichment used when the injectors come back on" aswell. Not sure. I always had a Rich tip-out and tip-in from coming back on. Maybe that table is active during both routines?

4) The lower times during lower RPM is so you don't get a "jerk" when coming off the throttle in low speeds. That's why the fuel cut for lower RPMs has a little delay, so you can close the throttle, then cut the fuel, in a different time window, smoothing the transition.

As I was typing that reply, I just had an idea; I might aswell make a Overrun per drivemode/mapswitch later on.

Thanks for the feedback. I feel like I'm getting it now. I downloaded the ROM "2011 USDM Subaru Impreza WRX MT AE5IB40L" just to compare table #1 and it's different but the RPM values are similar:

https://imgur.com/r6NZbsH

(Sry I can't figure out how to embed an image on this site. And I had to open ROM in ECUFlash, as RR didn't have a definition for it)

I'm not going to worry about it since I can see mine working as some sort of delta and the RPMs are close to the 2011 WRX.

Re: table 4: the fueling cut counter three RPM thresholds, I'll lower them and see how it acts. The Low zone gives it a full second of smoothed delay or whatever you wanna call it. I made things worse when I set that to 2200 up from the 1800 default.

I'm also going to play around with the RPM delta again, just adding 1 and testing it, no big leaps.

And if I still am unhappy with it, I will drop the Initial Enrichment BPW lower, down to zero and into the negatives maybe. Still need to research this. I probably need to reduce this regardless.

Regarding your screenshot, I believe that table address is wrong. As you can see, even the temperature axis is not reading correctly.

Best regards

A8DK100I

Sorry to bring up an old thread. But has anyone found the tables on AE5L500L?

AE5L500L