*Using CRAI8 4.6 pcm to operate a 5.0*

[ATPCR]

I'm using a 1999 Crown Vic pcm from a 4.6 liter to 5.0. 280.8x1.075=~301.8. If I am looking at the equation from the right way, the 5.0 is
approximately 7.5% bigger. That tells me that I need to make some adjustments that include changing the engine displacement and up some items in the fuel curve. I understand lambse and lambda, with a number above 1 being a lean mix. Also fuel stoichimetric 14.7 being best mix for pure gasoline. (The exact stoichiometric ratio depends on the specific fuel used, with different fuels requiring different air-to-fuel ratios).
I currently have a 1999 Crown Vic P71 strategy running the 5.0 that is tuned for the 4.6. When the engine is first started up cold, the numbers on the AFR gauge are moving around high 14's and 15, then quickly goes lean off the scale of the AFR gauge. This would make total sense to me being that
the pcm is currently tuned for a 4.6-liter engine. Coincidentally the fuel injectors are stock BOSCH 19 lb for the 4.6 and 5.0 and both engines have the same mm MAFs and throttle bodies too. Also, both have 2-line return fuel systems. The only thing that is different is the displacement.
So far in the YYAZ_ARA1_99CV_base.bin tune, I have increased displacement, turned off any rear o2 sensor related items and PATS. I still need to look at VSS settings and am looking for the rear gear adjustment and have looked and changed tire size.
I'm looking to find the fuel related settings. If any of you that has stroked their engine and had to make adjustments to the tune because of it, point
me in the right direction. I don't know what scaler, flag or graph that I need to adjust fuel properties. MP said,
"When fuel is dialed in your wideband will match your lambse. YOU CANNOT ADJUST FUEL IN ANY WAY SHAPE OR FORM UNTIL YOU KNOW WHAT YOUR LAMBSES ARE!!! With null modifier's your LAMBSE will be the exact value in your base fuel table at warm stable temps. However, in all cases,
you adjust your fueling to make your wideband MATCH your lambse"
I know what my lambse is and I have it adjusted to 14.08. I'm stuck from here.

[decipha]

engine size has no affect on fuel calculation at all

the only affect engine size has related to fuel is cranking pulse

going from a 4.6L engine to even a 10L engine will not change fueling since the air to fuel ratio (mass air meter to injectors) are unchanged.

lambse isnt adjustable in closed loop its based purely on feedback from the o2 sensors.

lambse is the commanded lambda (wideband afr). What wxactly did you change?

All you should have to do is fire it up and once she drops in to closed loop open the history table and select imaf which should be the first one. Just verify the fueling is good which it should be.

cold startup enrichment is going to be different between the mod and the sbf. Not surprising the sbf wants more startup enrichment. Simply go to the startup enrichment subtractor table and add fuel in the temp and engine run time where you want it no prob.

[ATPCR]

So far, I have only had it running in open loop. Then when it swings way lean, I shut it off and start it again. About 50 seconds per run.
I changed this:

and this: (this may have already been set to my fuel choice)

You have me looking for this:

I would believe that I want to adjust this to make it run richer in Open Loop.
And I stumbled upon this that sounds related to the startup OL mode:

I have seen a video of someone using a calculation function to add a multiplicative function across the field of the graph?


I haven't ever flashed this bin file and ran it. The only pcm that I have used is the 1999 Crown Vic P71 pcm.

[ATPCR]

So now I must be getting to the point that I get the base tune flashed in, Quarter horse in place and attached to the laptop with TunerPro RT
and go from there? This point has been a long time coming.

[ATPCR]

Late last night I decided to look at the 1997 XDT2 1997 Explorer files for reference. I'm aware that this bin IS NOT totally defined. I
didn't find the startup enrichment subtractor table for XDT2. Because it is written to control the 5.0, I considered copying the data somehow and use it in the 99CV YYA2 graph? Also the snip it pic below is from the Explorer file and was curious if some info could be gleaned from it?
From 97 Explorer 5.0 XDT2 bin file

[ATPCR]

I'm looking at this X/Y table and it appears that the horizontal X line is temperature and the Y line is seconds (time) running. From starting the engine so many times, the going extremely lean is 25 to 30 seconds into the run time. I would circle this on the table if I knew how to do that however, I'll just say column Y row X. I see that it goes 0 at this time which is to lean for my set-up.
6th or 7th row, 3rd to 4th column.
This is from the '99 CV 4.6 bin file.

The issue starts about in the middle of the table. Am I looking at some kind of AFR value? and are rich values represented by numbers smaller than 0?
On EECTuning.org, I found a knowledgeable Tuner explained what is happening in an OBD1 EEC-IV situation. I'm reading now.
https://eectuning.org/forums/viewtopic.php?t=16952
Maybe I need to change some middle, right and lower numbers to some .078s or something?

[ATPCR]

Well I have done something the wrong way. I made some changes. Closed TunerPro and when I reopened it, all of the table is all 0.000s.
I must have not saved bin.

[decipha]

you have a log file opened as a bin?

you dont have tunerpro setup correctly, read the getting started write up

why have you only ran it in open loop?

why would you shut it off ? why does it matter if it goes lean?

if your not running that bin file then why are you trying to make any changes to it ?

its probably more work to cross calc and use the xdt2 startup enrichment than it is to just dial it in

if you want more fuel there then simply kick up the value in the table in realtime and dial it in. Again though your base fuel has to be dialed in first so you need to verify that once it gets up to operating temp and you take her for a drive with the history table populating in the background.

[ATPCR]

Next time that I'm around the vehicle, I'll load the YYA2 bin file and see what happens. I've just been watching the AEM AFR gauge and
see it go off the scale lean and didn't think that would be good for the engine. I've been using a stock ARA3 tune which I assume that the fueling
is the same as your 99CV YYA2 tune.
My thinking is the OL fueling for the 4.6 can be changed for the 5.0 ahead of time seeing as I'm seeing what a possible issue is.
And what you said reinforces that. That modular engines run leaner at cold Open Loop that 5.0s do. I'll be going Real Time in about a week.
Thanks for your help and I will do one more post of a "snip" of the table that I'll adjust again and attempt to save it properly.
I have another suspicion that may be an issue. That the CHT that I installed in the back of the 5.0 head, may give lower hot temps than the 4.6
did. I have a resistance CHT chart that I can use and plug the Dvom into the test port that I have inline (the old ECT connector) to monitor this.

[ATPCR]

I've made changes to the chart which would be for the 2nd try of the YYA2 after I run it stock from your file.
I cannot make it save my changes. I know that I'm new at this, but I know a little bit. Thanks for being patient with me. It's not as painful on your
end as it is mine. There is not an instruction book for the most of it. I'm just now starting to comprehend your website information after attempting to get all of the way through it several times.
Is there a feature that will save the changes I made that are in red that can be part of my first experimental bin file change after running yours stock from the CRAI8, 99CvYYA2 download?
I made it a little richer where it is leaning out on me prematurely, but unable to save the changes.

EDITED: I just figured out how to save it. (the red X). Thanks for your help.