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

[delta448]

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.

With a port injection engine like the 4G63, a small amount of liquid fuel always sticks/pools in the cylinder head's intake ports. This fuel evaporates and adds to the cylinder charge at a rate dependent on air mass flow and temperature. When you quickly open the throttle, air mass flow increases suddenly and this pool of fuel evaporates more than previously. After the initial increase in evaporation both the amount of fuel pooling and it's evaporating rate is smaller. The lesser amount of fuel evaporating actually causes the engine to run lean until the fuel pool is re-established and starts evaporating at the previous rate again.

If you have an issue with AE, you will see your wideband read lean in your datalog right after a TPS % increase, and faster rates of throttle opening will cause further enleanment. If your car behaves acceptably when you slowly roll into it, but acts like it's shitting itself and knocks when you aggressively punch the throttle, it may be because it doesn't have enough enrichment and goes lean enough to start a knock event chain.

To tune this table, you determine what rate of change you've applied to the throttle and you determine the increase in fueling needed to maintain the AFR at a value close to whatever the target in your map is set to. Move in small increments. It's better to overshoot slightly on this table than undershoot, since running slightly rich actually increases torque over running at stoichiometric, and it will eventually stabilize at the target AFR anyway.

I haven't tuned this table on my own car yet and I don't even run a DSM ECU, so I don't know about this next part for sure, but usually in most systems the AE table also controls deceleration enleanment. If you overshoot your AE values, it will also cause the car to run overly rich for a moment each time right after the you lift off the throttle.

 

[RayRay32]

With a port injection engine like the 4G63, a small amount of liquid fuel always sticks/pools in the cylinder head's intake ports. This fuel evaporates and adds to the cylinder charge at a rate dependent on air mass flow and temperature. When you quickly open the throttle, air mass flow increases suddenly and this pool of fuel evaporates more than previously. After the initial increase in evaporation both the amount of fuel pooling and it's evaporating rate is smaller. The lesser amount of fuel evaporating actually causes the engine to run lean until the fuel pool is re-established and starts evaporating at the previous rate again.

If you have an issue with AE, you will see your wideband read lean in your datalog right after a TPS % increase, and faster rates of throttle opening will cause further enleanment. If your car behaves acceptably when you slowly roll into it, but acts like it's shitting itself and knocks when you aggressively punch the throttle, it may be because it doesn't have enough enrichment and goes lean enough to start a knock event chain.

To tune this table, you determine what rate of change you've applied to the throttle and you determine the increase in fueling needed to maintain the AFR at a value close to whatever the target in your map is set to. Move in small increments. It's better to overshoot slightly on this table than undershoot, since running slightly rich actually increases torque over running at stoichiometric, and it will eventually stabilize at the target AFR anyway.

I haven't tuned this table on my own car yet and I don't even run a DSM ECU, so I don't know about this next part for sure, but usually in most systems the AE table also controls deceleration enleanment. If you overshoot your AE values, it will also cause the car to run overly rich for a moment each time right after the you lift off the throttle.

Thank you VERY much for explaining this.

 

[PieEyedPiper]

Thank you VERY much for explaining this.

I know, talk about completeness, right?
Thanks, delta.

 

[GSXeclipsePSI]

Here is my OP that Im gonna post here.
OP

I am getting crazy knock above 3 counts all over even on next to no boost so Idk if its sensor plugs or flash. Im also not getting any difference in my WOT afr reguardless of injectors scaling and target afr at WOT is 11.2 but I'm hit 12.2-12.6. I have meth injection and its not doing anything for knock. IDK if i'm getting PK or the rom is bad idk can someone give some insight

 

[RayRay32]

Here is my OP that Im gonna post here.
OP

I am getting crazy knock above 3 counts all over even on next to no boost so Idk if its sensor plugs or flash. Im also not getting any difference in my WOT afr reguardless of injectors scaling and target afr at WOT is 11.2 but I'm hit 12.2-12.6. I have meth injection and its not doing anything for knock. IDK if i'm getting PK or the rom is bad idk can someone give some insight

OP:

I need alittle help trying to figure out why I'm running so lean on spool up and why my injector scaling for 1200cc is at 839cc and I'm getting knock. Any idea if this has to do with the rom or something not tuned right.

here is my log and ROM
Desktop.rar - 0.06MB

What is your fuel pressure?

 

[GSXeclipsePSI]

43psi at idle

 

[RayRay32]

43psi at idle

I tried to download your log but, I'm not going to jump over hurdles for it.

What does your o2 (primary) voltage look like?

What type of feedback is your knock sensor giving you?

What do your spark plugs look like?

Did you adjust your deadtimes? (batter offset, latency ... people call different things)

 

[nuclearr]

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?

PieEyedPiper I am having major issues with the big map as well I compared the maps from the big maps to the small maps. My version of the big maps maps is way out of whack. Id doesnt even look like any map I have come across. I have been driving on the big map and it runs like crap. Some times the car will not rev over 2500 like its hitting the rev limiter.

Just looking over things again the rom labled big maps has the same resolution as the free download.

here is a screen shot both are AFR Left is the bigmaps right is the free rom map

 

[GSXeclipsePSI]

Forgot this forum lets your post csv files so I added it below.


Ok I reset the battery by disconnecting the neg for 5 mins.

Also base fuel pressure was 41 so I bumped it upto 43/44 and now its running alittle better. Lets knock but still some even on stock rom. AFR is still 12ish.

My plugs are brownish and I'm getting knock at 5500+ and it jumps from 0 to 14-16 counts. I don't boost til about 4500.

I have a ebay style afpr could this be the problem?

Nuclearr send me a copy of your rom so I can look at it.

 

[PieEyedPiper]

PieEyedPiper I am having major issues with the big map as well I compared the maps from the big maps to the small maps. My version of the big maps maps is way out of whack. Id doesnt even look like any map I have come across. I have been driving on the big map and it runs like crap. Some times the car will not rev over 2500 like its hitting the rev limiter.

Just looking over things again the rom labled big maps has the same resolution as the free download.

here is a screen shot both are AFR Left is the bigmaps right is the free rom map

Nuclearr, I think I know what's going on for you. The free rom does not have bigmaps enabled, or likely even fully installed. Ceddy offers 4 roms. Free, BigMaps, SD and SD w/BigMaps.

20550011-mod-1v9Cb-MAF.hex
20550011-mod-1v9Cb-MAF-BigMaps.hex
20550011-mod-1v9Cb-SD.hex
20550011-mod-1v9Cb-SD-BigMaps.hex

When you look at the BigMaps entry on the free rom, you will see a bunch of shit that doesn't mean anything. This is normal. If you wish to make changes, do not do it in the BigMaps entry, do it in High Octane Map 1 or 2 Low Octane.

I'm sorry if I've misunderstood your post but I think this information will be helpful to you. The picture was helpful because I recognized the gibberish in the left table but the picture. That's exactly what BigMaps looks like on the free rom. The picture was too small for me to tell anything else.

Personally, I'm still trying to figure out how BigMaps actually works. It seems to rely on more than just itself? The High and Lo Octane maps are referenced? Maybe? Removed, even?

 

[GSXeclipsePSI]

Does anyone have the latest bigmap ceddy rom the link on ceddy sites down? 20550011-mod-1v9Cb-MAF-BigMaps.hex

The one I got from him last in my email was 1v9b7. I also need the newest 20550011.xml since I updated ecuflash and it deleted my newest one.

thank you

 

[ed1380]

All the downloads are still available. They're just now in the store section.

 

[RayRay32]

Does anyone have the latest bigmap ceddy rom the link on ceddy sites down? 20550011-mod-1v9Cb-MAF-BigMaps.hex

The one I got from him last in my email was 1v9b7. I also need the newest 20550011.xml since I updated ecuflash and it deleted my newest one.

thank you

Did you actually purchase it or did Ceddy just send you a copy of big maps? If you didn't buy it, now would be a good time to spend $30, even if you don't need SD or BigMaps

 

[GSXeclipsePSI]

Yes I paid along time ago I found them in my email dated back to 3/2010 so I'm happy I saved them I paid for them and I was doing a lot of testing with ceddy of many of the features.

I got my car running good, I found a copy of bigmaps 19cb and flashed it all my problems are gone. Funny thing is this is what I started with and my flashes late it stopped working. Now I'm holding correct afr and no knock and strong power in low and hi boost modes. Idk what happend to the rom file but I got it all good now.

i don't understand how to make the changes to the SD rom or I'd start to get it working. When I left off with it before my trans blew up me and ceddy couldn't get it to idle due to boost leak and or downpipe leak. They are fixed now but my SD logs show I'm not equaled up yet so there is still more adjustments to make.

 

[bjmauck]

I'm going from 550cc injectors to 1000cc and its bogging down and running rich ant part throttle 16.3 afr and idling rich like 11.4 afr. I can't figure out what to adjust to correct these.

 

[nuclearr]

After talking to Ceddy It turns out I was using the free 2055011 xml doc instead of the one that came with the big package, there was no information any where that they were different. But once I fixed this I reflashed and I could not even keep the car running at idle. I flashed back to my free rom and it runs fine. I can not figure out what is going on with bigmaps.

I am also have a heck of a time with EVOscan I dont trust the info it gives me and most recently can not even get it to work.

 

[GSXeclipsePSI]

I'm going from 550cc injectors to 1000cc and its bogging down and running rich ant part throttle 16.3 afr and idling rich like 11.4 afr. I can't figure out what to adjust to correct these.

did you set all the areas that need to be adjusted for the injectors. The correct battery voltages and the size the injectors by using a wideband to match your load cells above 100 to the correct afr?

 

[knochgoon24]

I'm going from 550cc injectors to 1000cc and its bogging down and running rich ant part throttle 16.3 afr and idling rich like 11.4 afr. I can't figure out what to adjust to correct these.

I'd double check your deadtimes / injector latencies. It's the latency vs. voltage table.

That table has more of an effect at idle than the injector scaling, so set your injector scaling near 1000 and adjust the latency at your idle voltage until it brings the fuel trims in check.

 

[RayRay32]

I am also have a heck of a time with EVOscan I dont trust the info it gives me and most recently can not even get it to work.

The only things that weren't right (for me) were the TPS scaling and DTC's. I still can't get the correct trouble codes but, I did get TPS to read from 0-100%. After troubleshooting a pig rich idle because I didn't trust evoscan's o2 data ... I now trust it much more

I need to spend a little time getting live mapping to work but, it isn't all that bad. I don't feel it was worth $25 because so much doesn't work ... just my opinion though.

 

[GSXeclipsePSI]

The only things that weren't right (for me) were the TPS scaling and DTC's. I still can't get the correct trouble codes but, I did get TPS to read from 0-100%. After troubleshooting a pig rich idle because I didn't trust evoscan's o2 data ... I now trust it much more

I need to spend a little time getting live mapping to work but, it isn't all that bad. I don't feel it was worth $25 because so much doesn't work ... just my opinion though.

Mine works great with the new XML files ceddy made. Do u have these cause I can post them for 2.6 and 2.7 that fixes alot of little things.

 

[Maverick4g63]

I'm interested in those definitions. I just recently got my spyder back up and running and will need to get started logging with evoscan asap. Im pretty sure im using 2.6, but I will have to double check.

 

[PieEyedPiper]

After talking to Ceddy It turns out I was using the free 2055011 xml doc instead of the one that came with the big package, there was no information any where that they were different. But once I fixed this I reflashed and I could not even keep the car running at idle. I flashed back to my free rom and it runs fine. I can not figure out what is going on with bigmaps.

I am also have a heck of a time with EVOscan I dont trust the info it gives me and most recently can not even get it to work.

Yeah that's what it was sounding like. Glad you got that part sorted out.

 

[RayRay32]

Mine works great with the new XML files ceddy made. Do u have these cause I can post them for 2.6 and 2.7 that fixes alot of little things.

I problably have them. I'm going to be at school pretty late so I doubt I will have a chance to look at what I have until later tonight.

 

[re-rx7]

I have a T28 and at WOT I can only run 8 degrees of timing max anything more and I get knock from 6-12 counts which was always around the 6k rpm mark. My AFRS I adjusted from 10.5-11.1 and no difference. Car just didnt want timing. I dont understand it. I made 225 (240-250 dynojet) whp on a mustang dyno on 17 psi. If I could run more timing this would have been alot better. The guy tuning my car was familiar with Ecuflash and has tuned many evo's so I doubt its his tuning abilities. Any ideas?




My mods are:
T28
560cc injectors
wally 255
full bolt ons

 

[ed1380]

What intercooler?