stephenlc

iTrader: (1)

Do you think Zemulator will work on our car? I am not sure how exactly does it work, do you use a laptop and program the ecu from there? If we put the VQ's settings in there, like timing, fuel air, it wouldn't be that much off would it?

stephenlc

iTrader: (1)

Okay I just read about it. You could take that little chip out of a VQ Ecu is you had a spare one around and do the same thing. Hmm, maybe I could get this to work for a maxima.

BigDogJonx

iTrader: (7)

This has not been figured out how to work on the 4th gen or 5th gen maximas. This was easily done on the 300zx because much much bigger aftermarket boost area. There is this one guy that can show you how to modify the entire EPROM on your own without needing any of this software, all you need is an EPROM reader/writer.

Basically, this aint going to work. EPROMs are much much different from car to car, even from a 4th gen max to a 5th gen max.

Dixit

DA-MAX

iTrader: (10)

contact Aaron92se he is running the Zemulator on his 3rd gen VE, but he is ONLY BETA testing it...

I've been working with Honda roms for the last 3-4 months and just saying "hey heres my Eprom, make it work, doesn't cut it" you have to develop a rom editor, break down the stock ECU info....good luck, start reading up on your programming and all that other computer BS

Bernardd

If the Zemulator works in the ecu then you can reprogram via a burner. Romeditor along with a z32 .adr file is probably all you need.
Bernard

DA-MAX

iTrader: (10)

no so far with using the Zemulator on the VE motor you must use with the Z32 ECU and MAF will not work on the stock ECU...now its up to yall to figure out if it works with the VQ...a lot of the questions you guys have would be answered if you do a search in the 3rd gen forum, we already went through the basics of this with Aaron duing his testing phase.

stephenlc

iTrader: (1)

Oh, I read the whole how to while at was at school, all 37 pages. Pretty informative, I learned about MAF, CPS, TP, and other things. It breaks it down in lamen terms. I just figured since we can use 300zx MAF and we share same injectors, it would not be that different from that car to this car. If the EPROM was physically the same size, would it work? You can adjust all the fuel and ignition timing to a maxima couldn't you. When you work in real time when the zemulator change all the values according to the car. Does someone know where to get this cheap. I am going to go luck for a spare ECU, and see if this can work. I might go down to Lightspeed here in Houston. They are 300zx tuning gurus.

subs1000w

i believe you can only get it from one place and its around 750$ lots of moola but a very nice tool for tunning

Nismo87SE

Don't even both trying the ZEM on your VQ. I'm pretty sure the VQ ecu is not a simular setup to the Z32, the VE is totally different also. Another problem is even if the VQ had a eprom ecu given its OBD-II you'd have to decode it. For the Zem to work good it would need the Z32 maf and ecu.

There is no way in hell a z32 ecu works in a 4th gen, that is unless you remove teh wire harness and switch it, but that opens another can of worms.

Bernardd

Send me a pic of the inside of your ecu and I can tell you if it can be easily programmed. The 89-93? ecu's are easily programmable. I've never seen the inside of any other's.

stephenlc

iTrader: (1)

I know someone has one laying around, but when I buy one I will open it up and post pictures.

Bernardd

I've got a copy of a vq engine's binfile. The vq map is different than the z32.

stephenlc

iTrader: (1)

Could you send it to me.

bcisn@msn.com

Bernardd

You have mail.

stephenlc

iTrader: (1)

Coolio, thanks man!

ilumo

Can I get a copy of that as well? And could you post a link to the 3rd gen forums discussing the zem.? thanks

MardiGrasMax

iTrader: (14)

a copy too please!

m.pelto@verizon.net

Do you have the abality to read eproms? I have a JWT ECU...

ejj

iTrader: (5)

Can one of you guys forward it to me?

eric@ericj.org

Thanks.

Prodeje79

if we cannot crack the code, how hard would it be to "copy" and "program" JW....errrrrr ECUs?

ejj

iTrader: (5)

If you've got the hardware to read and write EPROM's, easy.

Bernardd

link to binfile and some other info that could be useful to you guys.

http://www.tangentrix.com/forums/vie....php?p=621#621

I can read binfiles if someone wants to send me a prom or ecu. PM me if interested. I think you guys would be better off to change to a z32 ecu as they are fully hacked and at www.zcontrol.net? or .com a fellow has made a board to interface with ecu to allow realtime datalogging and I believe programming will be along shortly. Same functions as Zem but for 50 bux. Shift_good deal!!

DA-MAX

iTrader: (10)

if you come to MIR on Sunday I can read it on my burner...I'm bringing my whole setup because I have a few programs to test out.....launch control =

stephenlc

iTrader: (1)

What program do you need to read the bin files?

Bernardd

Romeditor and .adr file for the z32. Or any hex editor will work as well.
Google should get you there.

DA-MAX

iTrader: (10)

but even if you read it, whats the point?? without a dedicated rom editor, your not going anywhere....if you open the bin file you'll get something like this(this is stock bin for my Integra)

Bernardd

It's fairly easy to find fuel/timing maps in a Nissan Rom. I was burning chips for several months before I even knew about romeditor. I made my own .adr files for my z31 ecu. It's not easy when you start out but it's not impossible either. I've only seen two types of program structure used by Nissan in the ecu's with eproms. Don't know about the cpu's that are hardcoded except for the rb25/26 which use the same structure as the z32.

slimer

iTrader: (13)

one of my friends up here just got it for his shop. Its like a $100,000 machine that can actually reflash the ecu. I havent gotten up there (about an hour). I will try to get a hold of ferhan's program so we can check the difference between jwt's setup and nissan's. From that, we can recode my xtra 96 auto ecu.

ejj

iTrader: (5)

Do you have a document that describes these program structures, or do you care to share. I can find what "looks" like a map, but am not sure how to read it.

Do you know what chips A32 ECU's use? 6301 assembly compatable maybe?

DA-MAX

iTrader: (10)

Bernardd, could you email me the VQ file as well please, thanks

addaea2002@yahoo.com

Bernardd

Do a search on google for z32 ecu tuning. That will give you the basics. Most Nissans use the 6303/6803 processor with some of the older (80's) models use a 6802 cpu. Found the link
http://cherrypicker.tripod.com/turbo...dett/id10.html There's a bunch of files to download there as well.

Bernardd

It's on the "Tangentrix" link above. Or you'll have to wait until I get home.

subs1000w

i like the direction this thread is heading

good discution

ejj

iTrader: (5)

So -

I've never opened an A32 ECU, but if the program is held in the CPU itself and not a standalone ROM, what are our options for flashing new programs to the CPU? Are there sockets that can be installed such as Z guys do with the ROM? How expensive is the hardware used to read/write from the ROM in the CPU itself?

DA-MAX

iTrader: (10)

got it, thanks

slimer

iTrader: (13)

the hardware is big bucks. I still have to get a hold of my mechanic friend that just got it.

Bernardd

Not sure but it might be possible to reprogram thru consult port. Or remove the cpu and socket, then reprogram the cpu. Repeat if necessary. Or add a daughterboard and an eprom and reprogram it that way. Is the ecu connector the same as the older ecu's? It's not hard to repin a connector. Some of the 240sx guys have a daughterboard setup by JW? and are trying to figure out what the connections have to be made to force external memory to be used. Until I/we know what kind of processor the ecu uses it's anyones guess. *looks around the room for volunteer*

subs1000w

someone needs to open up a jwt reprogramed ecu and see what they changed

i thought all they do is solder a socket onto the board that replaces the stock "chip" then insert there reprogramed chip

stephenlc

iTrader: (1)

I read somewhere about performance chips. They said the take your original ECU and swap it out with an ecu that has a chip that is removable so it is easier to remove and tune next time.

stephenlc

iTrader: (1)

Maybe that is why JWT charges so much the first time say $600(not sure) and only $100 dollars to change the variables.

Bernardd

At least you/we would know how to connect external memory.