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Tuning EFI

huh, that must be a different version than what I'm running, mine just has rpm boxes for "cut fuel above" and "return fuel below"

fun fact, had to set the system clock on my laptop to 4 years ago to get tunerstudio to start up without frantically searching for updates and refusing to start. Kinda shit that'll piss anyone off.

ETA: I'd try setting them both to 1100 or whatever
 
Not sure what version you have, but here's mine:

Tuner Studio MS v3.1.08
MS3 1.5.1


Ok, so, progress. I changed the Over-run fuel cut. I left the "Highest RPM" at 1400, and changed the "Lowest RPM" from 1500 to 1300. That helped greatly. Ill probably tinker with it a bit more.
I was also messing around in the VE table, and that seemed to work but i need to blend in the changes. Once i get that done ill run it again and get a couple short logs. It kinda hunts at idle when first started (cold) but i didnt get a log of it because dumb, so ill try to get one later in the week. Im guessing its in the IAC but i gotta get a good log of it before i mess with it. I know it ignores the wideband at first start due to the sensor needing time to warm up, so might be something simple as just adjusting that a bit.
 
reptillikus said:
MS3 1.5.1
Click to expand...
that's the important one
I'm on ms2, the older and much simpler one

reptillikus said:
It kinda hunts at idle when first started (cold) but i didnt get a log of it because dumb, so ill try to get one later in the week. Im guessing its in the IAC but i gotta get a good log of it before i mess with it. I know it ignores the wideband at first start due to the sensor needing time to warm up, so might be something simple as just adjusting that a bit.
Click to expand...
you may well be running into bad portions of the maps, then when the rpms get low enough from it stumbling it picks back up
could be the warmup enrichment maps pushing a bad VE or timing map to its previously unused cells
 
Wildjon said:
post it up and I'll search
Click to expand...

My ecu is a sd48e with a DOE0 code.

A while back I did a ton of searching on the eeciv world and the stuff for this simply doesn’t exist. I guess anything on the sd48e will technically work with my ecu but my specific code is unobtainium.
 
Ummduh said:
My ecu is a sd48e with a DOE0 code.

A while back I did a ton of searching on the eeciv world and the stuff for this simply doesn’t exist. I guess anything on the sd48e will technically work with my ecu but my specific code is unobtainium.
Click to expand...

Found it in the database. What tables do you want to see or do you need a .bin file?
 
Wildjon said:
Found it in the database. What tables do you want to see or do you need a .bin file?
Click to expand...
No kidding? I couldn’t find it on the internet to save my life!

I wouldn’t mind seeing the same two tables you had posted above, but I suspect they’ll be pretty similar. Thanks!
 
1651099113280.png
 
Thanks!

Is that some kind of special sct .bin? Probably need the sct software to look around in there?
 
Ummduh said:
Thanks!

Is that some kind of special sct .bin? Probably need the sct software to look around in there?
Click to expand...
It would be a straight up .bin. SCT only scrambles it once it's pushed to the ecu.
 
Wildjon said:
It would be a straight up .bin. SCT only scrambles it once it's pushed to the ecu.
Click to expand...
but yes, you would need some software that defines the maps in order to see anything other than the HEX values
 
[486] said:
that's the important one
I'm on ms2, the older and much simpler one


you may well be running into bad portions of the maps, then when the rpms get low enough from it stumbling it picks back up
could be the warmup enrichment maps pushing a bad VE or timing map to its previously unused cells
Click to expand...
Could be warmup enrichment. Once it's warmed up it idles nice and smooth. I was messing around with my VE table yesterday so in the next day or two im gonna get a log of my cold idle to see whats going on, and then get another log to see if my VE table changes were good or bad.
 
yeah all that stuff plays into eachother and it is really easy to incrementally make it worse and worse
 
Is there a better way to set cranking spk timing?

I added a row in the spk table where I saw the dot run during crank, I initially had way too much advance at crank and it was hard to start. Anyway, I added a 700rpm row and changed the timing values where it seemed to be calling for it. It works much better, but I can't help to wonder if I'm doing it wrong?
 
that's pretty much what I did too
there might be a box where you can toss in a fixed cranking retard value for below whatever RPM but I dunno MS3 good

one thing to note is that your low RPM high MAP timing should be pulled back a lot over the idle boxes where it's low MAP and low RPM
sometimes I'll see where people set up the boxes at idle, then just 'smooth the map' by tossing way too much advance at the... top left? of the map

Think of it like a vacuum advance pot in a distributor, ain't doing shit at cranking, doing everything at idle
 
Just been chipping away. One truck is back apart for winter, the 250 only moved when it needs to.

Did a couple trips towing the 5th at the end of camping season, found some low rpm high load ping. Unfortunately I wasn't logging at that time, but for the trip home I pulled 2 degrees out where I thought it was. Helped, but didn't fix it.

When the stock computer was on it, it did it too.

So I started running loaded with 89 or 91 octane. I haven't been doing that since I swapped since I shouldn't need to.

I did find that I can lean shit waaaaaaaaay out at low load, and even medium load, and this setup just doesn't care. I'm scared to lean out at the top of the scale and that's really what kills my mileage because it's such an no-powered turd that it spends most of its time up there.

I spent considerable time tuning the trans, with the tugger kit in it, there's a veeery fine line between slip and bang.

I really need to build this engine and go back at it. If I can not spend another small fortune on the ranger over the winter I'll try to get started on that.

I have to re-read whatever it is 486 is saying right there because my brain just isn't comprehending what's he's trying to tell me today lol.

Edit: I did see that my iat's are out of control. Like showing 80+ degrees over ambient and more. I need to look into that for sure.

I believe I have some pretty good logs if anyone wants to take a gander at where I am at now.
 
I played around with low load mid rpm (highway conditions) tuning a lot. You can get away with quite a bit of advance at light throttle cruise. Think about a vac advance distributor- they will bring timing in to around 50 deg under high vac situations if I remember right. I also leaned mine out in the 15’s in that area and it didn’t seem to mind at all

I think what he’s saying is that cranking conditions closely mimic heavy lugging conditions- where you want to pull timing anyway. Low rpm low vacuum (high engine load, top left of the map). So pull a bunch of timing in that spot, by the time it lights you’ll be closer to your idle cells.

Now that I’ve moved out of emissions country I’m really considering mimicking your setup with a 90s f250
 
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