Hello, I'm french guy, and I need your help. I have a Lada Niva 4x4 car, and it's a Mono Injection (TBI) with a GM ECU. GM EFI-4 16186499 2124-1411010 BDJM6493 I want to modify some maps on Eprom to win some Power. I tried to do it, but I didn't have all informations about this Prom. Maybe I find 1 maps for spark advance and 1 maps for injection. Please find the prom file: http://avto-remont.com/download/ser/j4gm/bdjn6497.rar I saw that exist a Hack files for some Prom Mask, but I don't find mine. My Prom Mask is $F6. Could please help me, to find all maps I will do modify to tune my 4x4. I need to modify my Prom because I will run for a Raid in France, and I need to modify my car to win horse power and Torque, but I don't have a lot of money. If you help me, you help a big community for the Lada Niva http://www.nivaventure.fr I have an ALDL interface, and I have EFILIVE software to see dashboard and some information from ECU. If you want to see my project in French, please follow this link: http://nivaventure.forumactif.com/me...oint-t6784.htm Thanks in advance. If you need more information please contact me.

Please help me.

I need your help, because I don't find any information about this ECM.

Thanks

Chris

I have had the same problem with Opel omega it has also some GM ecu, but
since it is not so popular ecu finding def's could be almost unreal.
Its much better to obtain Megasquirt. the cheapest versions are 180$ unassembled...

Hello,

Thanks for you answer, but I don't have a lot of money, and I want to modify with a less money.

I need to disassemble my Bin, to understand how it's work.
So if you know someone wich he do it.

Bye

HEllo,

I find some maps on my GM ECU, but I need to find the AFR maps.
I try to disassemble my Eprom, and I don't understand correctly the tuto.

I need your help to know how disassemble correctly my Eprom, and how to find all maps, Flags, Constent.

Thats not a very popular ECU, so there is likely to be little info on it. Another possibility is to use a standard TBI PCM. They are very well understood and there are definition files readily available for tuning.

Check out this thread: http://www.thirdgen.org/techboard/di...-its-time.html (TBI guys, its time to update!)

Im not sure what the PCMs go for today, but when I still was working with them, I could get one for about $50 - $75 dollars locally. They are somewhat popular, so they are harder to come by now. To get a PCM to run a monobarrel would require some adjustments to the actual code of the PCM, or some trial and error tweaking to the memcal. In the code, the memcal is used to control when the injector drivers fire. Its possible to just fire the injectors on each distributer reference pulse, which is what you want when running a monobarrel on an I4 (I assume thats what you have).

The installation should be pretty easy. All you need to do is repin for connectors used by the TBI PCMs.

The sort of hard part is modding the PCM. Im not sure if its possible in MPFI mode to run a monobarrel by messing with the MEMCAL (others may know). But, by modding the software code (the actual bin), its possible to get a monobarrel to run properly. There are software controlled registers that can be used to fire the injectors arbitrarily.

I have a hack of the $0D that I wrote for the TBI PCMs that actually assembles and gives a complete bin. I also wrote my own custom OS for using MAF with TBI that uses the software controlled registers. That portion of my software could probably be pasted into the hack of the stock $0D code and modded slightly for the monobarrel.

I did a quick search, and there are some on ebay that go for $100 dollars or so. Not sure which memcal you would want. Likely you would want one for a Sonoma with a 4 cyl., but those where bank fire to my knowledge.

Thanks,

But in france, it's very difficult to find GM ECU.

I want to do, the definition file for TunerPro, I find Spark and Fuel Maps.
But not other.

This day, I modified my Eprom, and I win some power, but I need to change the AFR Maps, to win more Torque.
But I don't find the AFR Maps.

So I need to disassemble and find all informations on my Eprom.

Do you have a good software and Howt To, for me?

Thanks

Additionally, I suppose you could also switch to another ECM used in a more common 4 cylinder application here in the US. Not sure how many have been hacked, though.

Yep Why not.

In France, we have some Opel run with GM ECU, it's 4 cylinder, but it's same.
Not enough people wants modify they old cars.

Today, I have a good modify Eprom, my Niva run very nice.
But I want to know more about my ECU.

I will try to find Opel ECU, to see the reference, and find documentation on it.
If it's possible to swap with mine.

Thanks

How are you finding the tables? By simply searching for them using a hex mapping tool like WinOLS? You could reverse the entire bin with a dissassembler and hack the ECM. Once you do that, you can find all the tables and constants, but it requires a lot of programming knowhow. Doable, but well beyond the scope of your average modder.

Yes I know,

But I want to do.
Just I need the good documentation, and How To?????

I have a friend, which help me to modify and find maps.
Just I need, good software, good documentation.
And aftert that, I will do the hack, with a lot of time, sure.

DJ

As far as hacking goes, pretty much all you need to know can be found here on TGO.

Can you take some pictures of the ECM? If possible, it would also help to take the ECM apart and take some pics of the main board inside. That would help to see which ECM its closest to. If I had to guess, I would say that its similar to (or the same as) the ECMs used in the typical 4 cylinder TBI applications over here in the US.

Thanks a lot mate.

I will do photo tonight, because at this time, I'm working.

Russian, guys, swap the ECU without any change, just the Memcal, with [IMG]file:///C:/DOCUME%7E1/Dj/LOCALS%7E1/Temp/moz-screenshot.jpg[/IMG]01227887 Opel ECU.

Dj