crewchief264

I've been doing some ecu tuning research and have hit the point where I really need to do some techinical research. however from my perspective and what has been posted the greddy emanage while better than the apexi is still way behind just reflashing your ecu.

I have included some links and you guys tell me what you think??? I'm really leary about messin around with an ecu's chips and then re programming things, esspecially with having no experience; although I think with my resources I could get it to run and then have a tuner get it perfect.

http://www.mrtperformance.com/performance/link.htm

http://www.transtronics.com/memory/efi_ecu_faq.htm for the z32

http://cherrypicker.tripod.com/turbo...dett/id10.html

lots of info in the last one.

doublea

iTrader: (7)

That is some very informative infos specially the third link but it is for a Z TT, so I dunno for the max, I'll spend more time reading these link and give you feed back.

AA

nateplaysbass

I'm glad you brought this up. I was thinking about doing an independent study here at WWU, on flashing proms. Right now my background includes using a GM EPROM computer (different than flash) to run a Honda CBR600 F4i motor. this includes lots of fooling with the prom programers, and even making our own direct ignition system. (the computer was designed for a distributor, and the F4i has Coil on plug ignition)

I don't have time to read these links now, but I will try to keep talking to you about what would be involved in doing a project like this.

Happy modding

Nate

crewchief264

I appreciate the "few" of you that have read this and posted. I would really like to reprogram my ecu my self and I admit I still must really read on this and the programs used to recreate an ecu. As I am a complete beginner in ECU tuning, but have a very firm grasp of engine operation and seeing what common sense changes would need to be made to make power.

DA-MAX

iTrader: (10)

if you do some looking back in this forum, we kinda talked about it pretty nicely...also look in products for Nissans that already exist

http://www.z1motorsports.com/Product.../zemulator.asp
http://www.autoserve.8m.com/ROMEG.html
http://www.autoserve.8m.com/Nissan.html
http://300zx-twinturbo.com/conzult/products.htm(datalogging)

also this is very Honda related, but this is pretty much the birthplace of HOnda rom editing...lots of good info here and on the PGMFI webring as a whole--> www.pgmfi.org/phorum

the hard part WILL NOT be the actual tuning, so I wouldn't even worry about that...the hardest part is getting started and figuring out how to take **** like this and under stand what your ECU is telling you...ever look inside your ECU

Prodeje79

There was someone on the g20 forum that seemed pretty knowledgable on ECUs. I will look them up.

So how hard would it be to for someone to "Copy" my ECU with 370 inj, z32maf ,sc program for research, etc? I guess you could also copy my stock 97 ecu for my SE.

stephenlc

iTrader: (1)

I think the hard part is developing a program or have a machine that can decode what the ecu is saying and coverting it into variables that you can change.

Prodeje79

I found the guy I had in mind on g20.net
Here is a thread: http://www.g20.net/forum/showthread....threadid=17525

His nick is Phatg20 and he is from Broomfield, CO.

g20.net allows free searching I think too.

DA-MAX

iTrader: (10)

the hardware is pretty simple if the eprom is anything like a Honda rom, all you'll need is a burner($75-100) and an editor like Hex Editor(like posted above) to view the data....of course you won't understand it if you're not familiar, but thats the first step. from there someone will have to develop a rom editor to actually get this thing on the road so most anyone can make changes.

98fiveSpeed

Sup guys,

I dont know if you guys have run into a thread that I started in the 4th gen forum:

http://forums.maxima.org/showthread....5&page=1&pp=30

I am also working towards the same goal. Dont want to take any traffic away from this board, but I have a small site that I use just to log all of the developments: http://maxima.jatt.net

I will update it with all of the information that I can think of. The thread on maxima.org first link in this post and the second link above are both primary locations which I will make sure get updated. I would love to hear any other information that you guys have come across regarding flashing our ECU's. I have a couple of bins from 3rd gen maximas but since they had a different engine...not much use. I am concentrating on 4-gen 1997/8/9 model years.

DA-MAX

iTrader: (10)

if possible, could you please email those to me.....really would like to see them thanks ---> addae@snptuning.com

98fiveSpeed

DA-MAX, I will post them in this thread asap.

Here is some more information,

I take it you have never really used an actual consult unit?
To answer your question about the 2 ports. The obdII port is not used by nissan. that port is simply a data stream for generic scan tools. You can not do anything with the ecm through that connector except read info.

The consult connector is what nissan uses to communicate with the ecm and send requests to have actuators perform a task. There is only one or 2 things you can semi perminantly set. one is target idle and the other is timing I believe.

What it sounds like you are seeing or screwing with is a function of the consult called function test and/or active test These particular functions allow you to adjust fuel injection up to 25% above and below the current alpha. Adjust timing up or down I think its 10 degrees, Adjust your idle air control valve through its full travel to change the amount of air its taking in. and a few other things. But when you exit that mode in consult it reverts to what it was or exits the test mode it was in. If you are doing this by other means it may just not be exiting the test stage untill the key is shut off which is what the consult does when the key is cycled. It exits what ever setting you had it at before you shut the key off and starts over once the key is turned back on.

from NISTECH

98fiveSpeed

http://www.tangentrix.com/forums/vie...ghlight=maxima

DA-MAX

iTrader: (10)

good ****!! and keep us updated with your site and progress man ( http://maxima.jatt.net/ )