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

[the_mork]

You want to retard your timing. I believe the ecu is limited to -7. This can be fixed easily on an evo8 ecu but you'll have to wait for someone else to chime in as to whether this has been taken care of for the H8.

If the CEL is flashing and it doesn't feel like you hit a brick wall then it is probably knock. Check your timing in that area and see if dropping a degree or two of timing helps.

 

[Ceddy]

A few silly questions.

1. In order to increase the boost pressure obtained during anti-lag do we go neg (-) or pos (+)? I'm assuming neg, but at -7 I can't build more than 1-2 psi.

2. I have knock set to 5 counts, but everytime I hit 15 psi the CEL flashes. Is this because of boost limit, or actual knock? I have boost limit set to 250. If it is the boost limit setting, then what does it need to be set to in order to run 20 psi?

I'm using 20550011-mod-V8b1

I know this is said a million times on this board, but do a Boost Leak Test.
That might be your problem.


Ignition Retard Limit is removed, you can take it down to -27 or so.
Amount of boost you can build depends on your setup, turbo mostly.
Try raising the Stationary RevLimiter some and playing with the settings.

1.81 has Boost Cut Disabled by default.
Are your sure you are hitting the Boost Limit?
Fuel Cut is a throw your head threw the windshield scare the crap out off you kind of thing. If you are just losing power or bogging out, its most likely a boost leak or knock.

If the CEL on Knock flashes its real knock. Knock will pull timing and reduce power, you will bog out if there is to much knock.


Edit:

These are the settings I believe xhackerekx has to build 12 psi, with a 20G sized turbo.

As you can see it doesn't take much.

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xhackerekx video:
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[kiddsm95]

Thanks Ceddy, got that squared away. Just needed a little higher RPM.

Now I'm constantly getting the P1400 (MAP) CEL. Is there a way to turn this off in the periphery bits?

 

[AlphaVision]

A quick question here. Can the MDP sensor be turned off? I mean if I want to get rid of it will it cause some CEL or something...?

 

[Ceddy]

A quick question here. Can the MDP sensor be turned off? I mean if I want to get rid of it will it cause some CEL or something...?

If you remove the MDP, make sure the connector won't short out, there be +5 volts even if its turn off.

You will need to turn of all the equipment and CELs that use the MDP also. EGR, P1400, etc. Basically most of the emissions stuff.

 

[AlphaVision]

Well I will get a flashable ECU for my friend that supercharges his NA 2G and he has no MDP sensor and harness so that will not be an issue. Also he has removed his EGR valve only. The solenoid and wiring is still there, but they will be turned off. Thanks for the tip!

 

[obx tsi]

I have been reading through this whole thread and have quite a few questions. The first for now is, my ecu is an md346676 from a 98 eagle talon, which I think is flashable. Now with me running a 3" gm maf and translator will this evoscan and ecuflash help me tune the car better or not. Like most I have a limited budget so this seems really nice. Mods in my profile should be up to date and this is a daily driver for me so I don't want ruin my ecu. I'm sure I will have more questions as time comes but just would like to know if this is a good option for me with my setup. Thanks

 

[ed_GST]

ECU reflash will greatly improve your set up
It is compatible with you MAF translator

 

[the_mork]

You can also potentially get rid of your translator setup if you'd like depending on what you use it for and you may be able to more than pay off the cost of the cable by selling it. If you only use it for tuning and aren't particularly concerned with having a VTA BOV then ecuflash and your flashable ecu will offer significantly better tuneability and a whole range of features that a translator simply can't offer.

 

[Ceddy]

I have been reading through this whole thread and have quite a few questions. The first for now is, my ecu is an md346676 from a 98 eagle talon, which I think is flashable. Now with me running a 3" gm maf and translator will this evoscan and ecuflash help me tune the car better or not. Like most I have a limited budget so this seems really nice. Mods in my profile should be up to date and this is a daily driver for me so I don't want ruin my ecu. I'm sure I will have more questions as time comes but just would like to know if this is a good option for me with my setup. Thanks

The GM MAF Translator makes the GM signal look like the a Mitsu MAFs signal, so you can use EcuFlash with it just fine.


That being said, the GM Hotwires suck at giving a accurate airflow signal and temperature changes throw them off. EcuFlash will let you to tune it better, but if it was me I would switch back to a MAF or switch to Speed Density.

 

[obx tsi]

Thanks for the replies. If I do like you ceddy says then I would be changing a lot which I hate to do. Speed density is very intersting but not sure about it. Car drives good like it is so I am not sure what to do.

 

[the_mork]

Are your mods up to date? It doesn't look like they are. Fix them and we'll be able to help you more but I would say that flashing your ecu will be a significant positive step for your car.

 

[jeffo]

Your mods say that you have a 1995 ECU with a chip and stock injectors. Is that right? If so, where is your original ECU?

 

[obx tsi]

oops, forgot that I sold that and went back to the stock ecu.

 

[rstchris]

Ceddy, you are running big injectors right? I just got a new set of 1200s and i'm playing hell tuning. The injector scaling maxes at 621cc so I tried pulling the latency to lean out a bit but causes it's own set of rpm based problems. I ended up pulling about 15% from MAF scaling and another 15% from the afc just to get it close and that's still with the latency about half of what it should be. Is there a way I can get the injector scaling higher? Can I try messing with MAF size or MAF adder numbers? BTW this is with e85 and a 1g fpr too.

 

[Ceddy]

The injector scaling maxes at 621cc

You are doing something wrong, scaling won't max till over 2000cc.
(Technically you could use up to 30000 cc/min)

A have my 1150s scaled at 1002.(Running lower then stock fuel pressure.)


You should simple scale you injectors to the correct size, changing all that other stuff is going to make them harder to tune.

 

[rstchris]

You are doing something wrong, scaling won't max till over 2000cc.
(Technically you could use up to 30000 cc/min)

A have my 1150s scaled at 1002.(Running lower then stock fuel pressure.)


You should simple scale you injectors to the correct size, changing all that other stuff is going to make them harder to tune.

I was wondering about that, I don't know why it won't go up. I have everything crazy for the moment just so it will run but I would like to make it right. What would make the scaling stop at 621? Oh I got it, I have to manually type the number in instead of hitting the ]]] button.

 

[jeffo]

When you click on "Injector Scaling", and then "Edit"; Edit Map Definition", is it set to "InjectorScalingDSM"? Address 10806?
And, if you then click on "Scalings", make sure "InjectorScalingDSM" is set for x*0.015 and x/0.015.
BTW, the Lucas/PTE 1200's actually only flow ~1120cc on average. So, at 43psi base fuel pressure and E85 I would start with a setting of 750cc, and tune from there. They also have HUGE deadtimes.

 

[Ahnubus_29]

Well I fell like a fool but here it goes anyways. So I have EcuFlash and my Openport 2.0 cable working perfectly, got the flash cable in and everything seems to be working. So I go to read the rom off my Ecu and it gets clear through reading the rom a screen pops up stating that its an unknown rom image, and that EcuFlash could not recognize this ROM image using any of the current definitions. Can anyone help me, I can't figure out what I am doing wrong please help. Oh and yes I swapped out my old ecu with a new 98 Black plastic GST ECU #MD346675.

 

[ed_GST]

Just flash the Ceddy Mod ROM to your ECU
You won't have any trouble cross flashing them

 

[jeffo]

Just tell the program that you want to work with it anyway, undefined, and then save it as a backup. Some years went through many, many revisions, and we can't have definition files for all of them. Well, we could, but it would be pointless. We mainly want to work on the final revision, after all the bugs were worked out. In 1998 that was the 20550011 that Ceddy has done all the work on.

 

[95blackGsTurbo]

Kind of a noob question here but will I be able to set my readiness monitors by flashing? Mine have the problem of resetting everytime I turn the ignition off.

 

[the_mork]

They can be in a roundabout way, at least with my evo8 ecu. The same technique can be used with the H8 ecus but I'm not sure if Ceddy has done it yet, you'll have to wait for him to chime in or someone else who follows this thread more closely.

Basically the setup is that you change the referenced memory addresses of the readiness checks to an address that has the correct identifier for passed and presto you have insta-perma readiness.

 

[Ahnubus_29]

As of right now no one has coded in cheating the emission test on these ecu's yet, and ceddy said he was not going to be the one to do it either.

 

[95blackGsTurbo]

I read in another post that people were doing it I thought. His Ceddy Mod thread.