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

[ed_GST]

sad to hear what happened to your ecu

good news about the crossflashing

will have a 99 GST ROM to add it to the list

 

[rstchris]

Yeah, that is one method you use to get your injectors dialed in.

You can turn off closed loop, so the O2 sensor isn't used at low rpms.

Then if your AFR readings are off at high rpms, injector size needs adjusted.
If off at low rpms deadtime may need adjusting.

EvoScan has a neat feature called Map Tracing, you Log RPM, Load, and for example WideBand AFR. Then you load your Fuel Map, and it will overlay your wideband readings in the correct cells.

I've noticed I can't get it to act up when my o2 is unpluged, I have also noticed that my idle is a bit lean and it levels out about 2k, from there it just gets too rich. If I hold 10inhg from 1800rpm all the way to 4500 it will go from 14.9 to about low 12's. I didn't have this issue before the MAF swap and I noticed that the screw on the bottom was messed with. Is there a reset prosedure for it?

 

[Ceddy]

I've noticed I can't get it to act up when my o2 is unpluged, I have also noticed that my idle is a bit lean and it levels out about 2k, from there it just gets too rich. If I hold 10inhg from 1800rpm all the way to 4500 it will go from 14.9 to about low 12's. I didn't have this issue before the MAF swap and I noticed that the screw on the bottom was messed with. Is there a reset prosedure for it?

2) Rescale your MAF.
Check Out ->
How-To: Rescale your MAF (without pics) - evolutionm.net

 

[rstchris]

2) Rescale your MAF.
Check Out ->
How-To: Rescale your MAF (without pics) - evolutionm.net

Thank you Sir! I was afraid to mess with that cause I didn't know exactly how it worked.

 

[ZLODEY]

The EVO and 3G MAF are effectively the same unit, so either can be used.

EVO Part Number = ???????
3G Part Number = ????????

is this 100% correct
EVO MAF Part Number = MR578399
3G MAF Part Number = MD336501

 

[the_mork]

This give you the information you need on MAFs.

KEYDIVER Chips - 3G MAS Package

 

[Ceddy]

Thanks for everyone's kind words.

If you wish to make a donation can do so here -> Ceddy's DSM EcuFlash Page


I am currently without a working ecu. If anyone has a spare they are willing to let go of, that would help things out a lot.

 

[Ceddy]

First I would like to say thank you to everyone who has made donations.
I bricked my ecu, and the price of flashable ecus has doubled or tripled since I started making DEFs for them.



I've started a set of Mods, like the Tephra Mods for the Evos.

So far i have coded a 2-Step, it is adjustable for 2-Step rpms and the speed(mph) where it switches to the normal RevLimiter.

Next I will add Anti-Lag(Ign Retard) to the 2-Step.

The other Mods I plan to add are: CEL on Knock, Map Select, and Octane Reset on StartUp.

If anyone has any suggestions, that are easy to code, I will add them also.



Since I don't have an ecu, I need some Beta Testers to help test code.

Beta Testers need to have a good knowledge of EcuFlash and EvoScan.

Be able to test my Mods, make a Log file and get back to me quickly.

Be innovative and willing to take a risk. Having a backup ecu is a must if you are using your daily driver. This code should be safe for the ecu, but it is untested.


If you would like to help Beta Test please PM me.

If you have suggestions for Mods, post in this thread.

 

[Ceddy]

Chris (money_pit) and I already have it covered.

James

Thanks guys.

I flashed the 99 Spyder ecu with the 99 GSX image first, then back to the 99 Spyder, then the 99 GSX again.

Then I flashed the 98 GST image, then the 99 Spyder, and back to the 98 GST.

So all of 98 and 99, GST, GSX, and Spyder ecus are compatible for cross-flashing.


I'll plug the Spyder ecu into the car tomorrow, and check if the knock sensor and the other things the Spyders don't have work correctly.

Thanks again.

 

[m_0ney_pit]

ceddy did you cross reference the chips from the spyder board to the image logic posted of the 99 gsx board?

the only thing I see possibly being an issue is the differences in resistances of the injectors from a high impedence on the spyder to low impedence on the turbo cars.


Does anyone have an idea which chip is the injector driver?
Also we need to trace fuel pump relay pin to make sure that chip is also the same.

 

[hediki12]

this is realy cool. ceddy keep up the good work. umm quick question. can you do this in a 1g with the 98-99 2g ecu?

 

[the_mork]

Yes you can with a little bit of work. Check out the ecuflash section at evolutionm.net for a thread about putting an evo8 ecu in a 1g. If the evo8 ecu can be put in a 1g then so can a 2g ecu.

 

[Ceddy]

ceddy did you cross reference the chips from the spyder board to the image logic posted of the 99 gsx board?

the only thing I see possibly being an issue is the differences in resistances of the injectors from a high impedence on the spyder to low impedence on the turbo cars.


Does anyone have an idea which chip is the injector driver?
Also we need to trace fuel pump relay pin to make sure that chip is also the same.

I compared my 98 board to the 99 spyder and couldn't find any difference. The programmable logic IC next to the ecu has the same chip number E328, but the serial number is different. Don't know if that matters though.

Turbo cars have low impedance injectors plus a resistor pack, so the ecu sees them as high impedance.

 

[steve]

Does anyone have an idea which chip is the injector driver?

There are four discrete transistors that are the drivers for the injectors just like before. I haven't looked closely to see if there are any differences in the rest of the injector driver circuit like the snubbers compared to the earlier ECUs.

I'm limited in what I can do until I figure out how to mod a 1.3 cable to flash. I suspect it's just providing the programming voltage but I haven't seen a 2.0 cable to compare.

 

[m_0ney_pit]

Did you find that missing resistor in the knock sensor circiut I was talking about?

Any thoughts on the fuel pump relay issue?
Is the 99 spyder rom simialar to the 99 gsx and gst roms?

I compared my 98 board to the 99 spyder and couldn't find any difference. The programmable logic IC next to the ecu has the same chip number E328, but the serial number is different. Don't know if that matters though.

Turbo cars have low impedance injectors plus a resistor pack, so the ecu sees them as high impedance.

 

[Ceddy]

Did you find that missing resistor in the knock sensor circiut I was talking about?

Any thoughts on the fuel pump relay issue?
Is the 99 spyder rom simialar to the 99 gsx and gst roms?

I just tried the spyder ecu in my car, and the fuel pump doesn't turn on.
Everything else seems to work, even the boost gauge seems functional.

I'll try to trace the fuel pump relay and knock sensor pins back to the cpu to see whats different. Hopefully its just something like a missing resistor, that I can add.

 

[the_mork]

I doubt that this helps much but jjgriz (I think thats how his name is spelled) had to wire up a switched direct circuit for his fuel pump when he went from a 4g64 ecu to a 2g ecu in his Spyder.

 

[m_0ney_pit]

Ceddy did you have any success with pin tracing?

 

[Ceddy]

Ceddy did you have any success with pin tracing?

I see where you are talking about the Knock Sensor Pin is missing a resistor, the 98 GST I have is also missing it there.

I didn't notice before, but the H8 boards are multi-layered(Two PCB glued together, with traces on the inside), this makes tracing them very hard.

Playing with the ecus I found out the Spyder ecu outputs +5vdc to turn the fuel pump on, and the other DSM ecus pull the fuel pump relay to ground.

I'll get a 5v relay and see if everything works with the spyder ecu then.

 

[Ceddy]

Got the Spyder Ecu working, fuel pump relay needs to be hooked up differently, boost gauge doesn't work, not sure about knock sensor yet.

The motor runs and idles fine, the only CELs I got are the Rear O2 and emissions stuff I don't have hooked up.


Trying to get my 2-Step code working now that I have an ecu to test it on.

 

[m_0ney_pit]

Wow so not only are you the first person to flash a dsm ecu but you also are the first to convert a dsm spyder ecu to a dsm turbo ecu

If there is no cel for the knock sensor then the ecu should be seeing it. If the timing is staying under 10 degrees under boost then the ecu isn't seeing it.

wonder why the ecu isn't driving the boost gauge. that might be driven by non-flashable firmware at the hardware level.

 

[Ceddy]

wonder why the ecu isn't driving the boost gauge. that might be driven by non-flashable firmware at the hardware level.

Looking at it a second time the boost gauge does works, it seems like has less travel though.
Its sits half way to bottom at idle, thought with other ecu it went all the way to bottom.

 

[m_0ney_pit]

I'm pretty sure the knock sensor will work, a cel appears if it is not connected correct? It says knock sensor circuit malfunction

 

[Ceddy]

I'm pretty sure the knock sensor will work, a cel appears if it is not connected correct? It says knock sensor circuit malfunction

Yeah, think so. I'll log Knock Voltage and KnockSum to make sure its working correctly.

 

[m_0ney_pit]

so what did we learn from the 99 spyder ecu flash experiment?

-All 98-99 dsm images are interchangable and crossflashable from year to year

-spyder owners no longer have to rewire the fuel pump relay module, just flash gsx image to the spyder ecu and it'll work (big plus)

-you can use a spyder ecu in a pinch, there are alot more of these floating around in junk yards than turbo ecus and cheaper