ECUflash First Flashed DSM ECU! (98/99 Flashing FAQ)

[white92talontsi]

I have a quick question.

I am trying to figure out how to tell the ECU to ignore any knock below 3000 RPM and 30% throttle.

Is there a way to do this in the knock tables?

 

[Fast-Orange]

Are the fwd and awd ecus interchangeable, ie can i put a fwd ecu in a awd and change programing to show its an awd or does it matter? could not find a clear answer on that, i am also refering to the 98 99 flashable ecus.

 

[ed1380]

The fwd and awd ecu's are physically the same. The files are 95% the same.

Awd has no speed limiter and iirc the tables are a hair different for higher load.

But you can swap them and you wont really notice the difference. And it really doesn't matter because once you flash the ceddy file, you're running a modified gst file.

 

[Fast-Orange]

ah so it really doesnt make much of a difference good to know! thanks for the answers guys!

 

[PieEyedPiper]

Can you alter the id data of a rom? For instance, can I tell the the 98 GST rom that ceddy uses that it's actually a 98 gsx rom through hex editing, or the like?

 

[ed1380]

Is there any reason you'd want to do that?

 

[PieEyedPiper]

Is there any reason you'd want to do that?

Yep, so when the car is hooked up it won't read the wrong vehicle/year/model/rom id.

 

[ed1380]

If you're talking about emissions don't worry about it. They scan the barcode by the vin to ID the vehicle. And the ecu just tells them readiness.

I used ceddymods on the 97 when passing emissions with a slightly modded file (wink wink) and it passed with flying colors :cool

 

[PieEyedPiper]

If you're talking about emissions don't worry about it. They scan the barcode by the vin to ID the vehicle. And the ecu just tells them readiness.

I used ceddymods on the 97 when passing emissions with a slightly modded file (wink wink) and it passed with flying colors :cool

Good info. Thanks.

 

[white92talontsi]

Back again.

So I finally decided to buy the complete version of Ceddy mods.

Had a quick question.

When you download the full version you know it gives you 4 different ROMS you can flash.

For my car I flashed the MAF with Big Maps.

If my assumption is correct then as long as I do not turn on map switching and I do not enable map 1 or 2 then it will use the default map which would be the big map.

Another thing. I am running 25psi on my car so I enabled 1byteload. In my log that I took tonight 1byteload was being logged but was at a very low number.

Should I disable that and just log 2byteload?

My issue is that I am trying to tune my Timing table and am not sure what load cell I am in at a certain RPM.

Other than that I cannot believe how in depth the full version is.

 

[knochgoon24]

Are you also using the modified data file that's included for Evoscan?

 

[white92talontsi]

Are you also using the modified data file that's included for Evoscan?

Good catch, I forgot about that. So using that will make the 1byteload value show a reasonable load value?

Make sure I do this Right, Put it in the EvoScan/Data Settings folder correct?

 

[knochgoon24]

Something like that.

The one byte load uses a multiplier transmit load value greater than 160 in one byte.

 

[PieEyedPiper]

Just for reference, from my experience, using big maps on an otherwise stock car (no tuning) will introduce a shit tonne of knock.

 

[white92talontsi]

Just for reference, from my experience, using big maps on an otherwise stock car (no tuning) will introduce a shit tonne of knock.

I am actually seeing the opposite. I actually lost a lot of power switching to the big maps.

I investigated my logs and found that the Timing was way down. Like -2* during spool up.

I am running a 20g on the car at 25psi.

 

[PieEyedPiper]

I am actually seeing the opposite. I actually lost a lot of power switching to the big maps.

I investigated my logs and found that the Timing was way down. Like -2* during spool up.

I am running a 20g on the car at 25psi.

And that's with identical fuel/timing as you had running well before on a non-big maps rom?

The normal ceddy mod rom gives me pretty much no knock, ever, sometimes when I stab the throttle at 3k it will knock and then I have to let off to get below 5 counts. Otherwise, it's great right out of the box. Remember stock 450's/rewire/T25..
The BigMaps rom gives me knock all throughout the rev range. No, the MIL is not constantly illuminated showing me infinite knock any time the car is on, but I do get light throttle, partial throttle, spool up, and WOT knock so... yeah almost.

I'm not sure what the issue is, as from speaking with Ceddy, himself, about it he indicated that the BigMaps romp should behave exactly like the MAF rom, only with greater resolution giving a sense of enhance driveability. More benefits to be found once you need load cells beyond what the MAF rom could do for you.

So, I'm at a loss why it is performing so much differently. The car feels the same with bigmaps but the knock tells the real story and WOT is out of the question if I want my 150k block to stay together.

WB is on the list.

 

[colbyc]

And that's with identical fuel/timing as you had running well before on a non-big maps rom?

The normal ceddy mod rom gives me pretty much no knock, ever, sometimes when I stab the throttle at 3k it will knock and then I have to let off to get below 5 counts. Otherwise, it's great right out of the box. Remember stock 450's/rewire/T25..
The BigMaps rom gives me knock all throughout the rev range. No, the MIL is not constantly illuminated showing me infinite knock any time the car is on, but I do get light throttle, partial throttle, spool up, and WOT knock so... yeah almost.

I'm not sure what the issue is, as from speaking with Ceddy, himself, about it he indicated that the BigMaps romp should behave exactly like the MAF rom, only with greater resolution giving a sense of enhance driveability. More benefits to be found once you need load cells beyond what the MAF rom could do for you.

So, I'm at a loss why it is performing so much differently. The car feels the same with bigmaps but the knock tells the real story and WOT is out of the question if I want my 150k block to stay together.

WB is on the list.

Figured you'd have a WB anyways haha But maybe you have, or was set somehow mysteriously by a ghost the knock settings set to pick up beyond the limits in the MAF version? That's weird though for sure, haven't heard that one yet.

 

[PieEyedPiper]

Figured you'd have a WB anyways haha But maybe you have, or was set somehow mysteriously by a ghost the knock settings set to pick up beyond the limits in the MAF version? That's weird though for sure, haven't heard that one yet.

Trust me, I too, thought I'd have a WB by now. But, yeah, I'm still thinking about this one. I haven't looked into the rom too deeply yet, but I've now seen it suggested twice now that the BigMaps are just Evo9 maps, straight-up (despite what I thought Ceddy told me). That would explain why my car acts relatively normal but the ECU is probably working it's ass off to keep trims reasonable. I'll look through and confirm this if I can later today.
I've also manually adjusted the knock settings so it's not a sensitivity/threshold issue.


Anyways, the reason why I'm posting today is that I wish to know if the "Map Select" feature is still implemented? I've seen it in screen shots, I've seen it mentioned in Ceddy's FAQ - but when I look for it in my rom it's not there.

Was it removed? Is it still there and I just have no idea what I'm doing? I guess the real question is, how do I make use of the Map Select feature?

 

[nuclearr]

Good catch, I forgot about that. So using that will make the 1byteload value show a reasonable load value?

Make sure I do this Right, Put it in the EvoScan/Data Settings folder correct?

I have no data settings folder in my evoscan where do I need to put the file?

I found it but it gave me all kinds of problems to get working not even sure if its correct.

 

[PieEyedPiper]

Just tripple checked. All of Ceddy mod's ROMs have injector scaling at a square 450 to start. So why BigMaps gives me a shit-tonne of knock is still a mystery.

Can anyone else post their experiences using BigMaps?

 

[ed1380]

Is the knock also on stock boost levels?

 

[PieEyedPiper]

Is the knock also on stock boost levels?

Yeah, it's found even off-boost. Largely found when over 35% tps no boost, and definitely at boost onset. I run 14psi, spiking 15. If I "coax" it into boost then I can fly freely to redline. If I stab it, even with the slightest aggression, then I will load up 15 counts of knock in no time. Letting off and then getting back on helps or can even remove the knock.

Only with BigMaps, the plain MAF ROM works just dandy. I even went on to investigate/compare the BigMaps with the normal maps I always run. Hardly a difference to speak of. Really, it's just greater resolution as Ceddy said it was.

Still not sure why it knocks so much. I'm assuming the timing map must be different, as I've yet to go through that map. The injectors are still set for 450, like the other roms. More tomorrow.

 

[delta448]

CB, I hesitate to say this without a WB to confirm, but it sounds like an inadequate acceleration enrichment issue. Have you tried increasing the higher TPS Delta % values to a higher enrichment % on the Async Accel Multiplier vs TPS Delta table?

 

[RayRay32]

CB, I hesitate to say this without a WB to confirm, but it sounds like an inadequate acceleration enrichment issue. Have you tried increasing the higher TPS Delta % values to a higher enrichment % on the Async Accel Multiplier vs TPS Delta table?

Excuse my ignorance but, can you elaborate on this? Maybe explain what it is (yea yea, obvious context clues). How would this be tuned? I'm not being a smartass, I simply do not know the logic behind how to tune those values. I.E. when to increase or decrease and to what degree.

 

[PieEyedPiper]

CB, I hesitate to say this without a WB to confirm, but it sounds like an inadequate acceleration enrichment issue. Have you tried increasing the higher TPS Delta % values to a higher enrichment % on the Async Accel Multiplier vs TPS Delta table?

It's good spot to look when my the WB goes in. I agree, no real mucking about should be done without it.

Thanks.