300zx ecu
08-03-2005, 03:18 PM
#2
The pinout is probably going to be the issue. That is what turn out to be the problem with my car. I use to have a diagram...but if you can figure out the pinout and how to rewire the harness to match, I bet you'll get more out of the ECU.
S
S
08-04-2005, 05:24 AM
#3
Sarin,
Did you ever get that one dude to reprogram your ecu? Do you remember what I am talking about? It was about a year ago some guy saying he could reprogram our stock computers. If you did, did you notice any difference?
Did you ever get that one dude to reprogram your ecu? Do you remember what I am talking about? It was about a year ago some guy saying he could reprogram our stock computers. If you did, did you notice any difference?
08-04-2005, 06:53 AM
#4
From all of the previous posts on this, the Z31 ECU was supposed to plug in directly, as long as you matched year and tranny...
However, most people who did the swap noticed drivability issues. This could very well be attributed to differcnes in the MAF. Virtually all of the other sensors are the same - down to the part number...EXCEPT the MAF. Very strong possibility that swapping in a Z31 ECU AND MAF could not only show a minor improvement, but SHOULD (in theory) prevent the drivability problems encountered by all the others in the past...
Just my .02...
However, most people who did the swap noticed drivability issues. This could very well be attributed to differcnes in the MAF. Virtually all of the other sensors are the same - down to the part number...EXCEPT the MAF. Very strong possibility that swapping in a Z31 ECU AND MAF could not only show a minor improvement, but SHOULD (in theory) prevent the drivability problems encountered by all the others in the past...
Just my .02...
08-04-2005, 03:45 PM
#5
Well you can do a straight swap, and it will work. The driveability issues come from pinouts being wrong. Just looking at the diagram there is a difference. The Z31 ECU also throws a bunch of codes on top of that.
S
S
08-04-2005, 09:43 PM
#7
yeah thats what i was thinking but i got a 85 300zx non turbo automatic ecu, im having so much fun with this damn thing, i was on the freeway and i punched it al the way new redline limit is 6500 rpm i got so damn scurred i shut it down immediately, then this verry loud growl like godzilla was right be hind me bout to bite my *** as i let off the acellerator 
the best mod yet. 
the best mod yet.
08-05-2005, 05:52 AM
#9
Senior Member
Join Date: Nov 2003
Posts: 398
Yep. mine will rev to 6500 too, almost 7 and then the rev limiter kicks in. It scares people beside me when it growls like a banshee and then bounces off the rev limiter for a split second, goes BBRRRRRRRAAAAAAAP, and then gets a nice 2nd gear chirp. With an automatic.
09-26-2005, 03:38 PM
#12
Question about this mod again. So Big E, did you switch the MAF and plug? What all did you do? Im getting bold with mods lately and thinking about this as a new mod. I got the mod bug kind of heavy since purchasing rims and Cardana's CAI. Im also thinking about just purchasing a brand new Factory rear lip spoiler from Wings West. I need to space things out more. Starting Martial Arts this coming month and it isnt cheap either.
09-26-2005, 03:48 PM
#13
I personally never go past 6k rpm. It sounds awesome, but a dyno chart shows there is no reason to hold it out that long the way power drops off. In fact, when I shift, the higher the gear, the sooner I shift.
Q: The MAF pinout on the Z31 MAF should be identical.
S
Q: The MAF pinout on the Z31 MAF should be identical.
S
09-26-2005, 03:52 PM
#14
I dont go past 6k either. No need for me. Ive hit it in 1st gear before if I can get it to stay there that long before shifting. Dont want to jack up the Transmission, thatll be one mod I wouldnt want to pay for. Especially since I am auto.
09-26-2005, 04:13 PM
#19
i think that all the connections are the same dont kno bout the ecu tho i just had some fun trying to keep up with a subaru wrx sti and those things are quick as he passed me i think he gave me a thumbs up i think that time i was around 5500k rpm's
09-27-2005, 05:38 AM
#22
Originally Posted by SurraTT
ive also been thinking about this, mabey a 300zx non turbo 5 spd?? and the maf and tb???
idk im about to build a cai 3 in pipes isent the tb bigger??
idk im about to build a cai 3 in pipes isent the tb bigger??
09-27-2005, 08:38 PM
#23
friggin quick post thing just went right to post reply as i was typing god that irritating!
any way
a note on the MAF issue....there is an adjustment screw thingy thats capped off on a nissan factory MAF, HOW EVER on my remanufactured replacement there wasnt a cap and there was an allen wrench for an adjustment, i took my old factory maf appart and the same thing was there just had an aluminum cover over it so it cant be messed with....the adjustment is in the round part next to the connector...if your going to be adjusting it you'll need to pop the silver cap off some how and i do not know if its sealed beyond that...
my remanufactured MAF was also listed for pathfinders, 300Z, Pickups....basicly what ever had a VG motors from the mid 80's....what i am trying to say i think its the same MAF over all of them, just some are adjusted differently with this screw...what the screw acually does i am not sure but thats the only thing, other than that the mafs are identical
any way
a note on the MAF issue....there is an adjustment screw thingy thats capped off on a nissan factory MAF, HOW EVER on my remanufactured replacement there wasnt a cap and there was an allen wrench for an adjustment, i took my old factory maf appart and the same thing was there just had an aluminum cover over it so it cant be messed with....the adjustment is in the round part next to the connector...if your going to be adjusting it you'll need to pop the silver cap off some how and i do not know if its sealed beyond that...
my remanufactured MAF was also listed for pathfinders, 300Z, Pickups....basicly what ever had a VG motors from the mid 80's....what i am trying to say i think its the same MAF over all of them, just some are adjusted differently with this screw...what the screw acually does i am not sure but thats the only thing, other than that the mafs are identical
10-17-2005, 09:27 PM
#25
You wont know if they are working from the junk yard. Its called trust. Which unfortunately is what you are going to have to do. Junkyards are cheaper. If you want a brand new 300zx maf expect to pay over 100 easy. They arent cheap brand new.
Niku: You are correct. A long time friend of mine Nismo87se, which is the one who pioneered the modding of our cars here on Maxima.org back in 98-99 time frame and passed on info to me and Sarin and others, told me that if I ever were to do the intake mod that I would need to punch a hole in that adjuster. Adjust it a certain way and reprogram it into the ECU to take full advantage of the CAI or my kind of intake mod. I did not do this yet because I was just trying to get the darn thing in and working. That is going to be my next step eventually. I believe you would need the FSM to do this. I believe Nismo87SE saved a picture of it in the Yahoo 2nd gen maxima club files.
Niku: You are correct. A long time friend of mine Nismo87se, which is the one who pioneered the modding of our cars here on Maxima.org back in 98-99 time frame and passed on info to me and Sarin and others, told me that if I ever were to do the intake mod that I would need to punch a hole in that adjuster. Adjust it a certain way and reprogram it into the ECU to take full advantage of the CAI or my kind of intake mod. I did not do this yet because I was just trying to get the darn thing in and working. That is going to be my next step eventually. I believe you would need the FSM to do this. I believe Nismo87SE saved a picture of it in the Yahoo 2nd gen maxima club files.
11-14-2005, 06:59 PM
#27
Newbie - Just Registered
Join Date: Nov 2005
Posts: 1
ecu
im new the the max perf world...i have an 85 max wagon.. its quick so i started looking online and found maxima.org......great website guys....but any who, I just picked up an ecu from an 89 300zx, but its from a 5spd... I m driving an auto matic... i didnt know if my ecu could be reprogramed to recognize the auto or if it would be easier to just go diving and find one with from the same year with an auto... thanx a bunch... 
12-12-2005, 03:35 AM
#30
Newbie - Just Registered
Join Date: Dec 2005
Posts: 4
I hope this is not considered offtopic. I am about to buy a Nissan 300C in Europe. It is a Y30-chassis 1986 sedan with VG30E engine and automatic transmission, no catalysator required 
Its ECCS box (or ECU) is supposed to be pin compatible with Z31 box, but someone reported that direct swap won't run as it should.
The reason why I am writing here is the broken ignition system in the car. The current owner says, that if it worked before he started to repair it, it most suddenly won't work now. I am considering replacing all the ignition parts ( distributor, ignition coil and power transistor) with 3rd generation Maxima parts. You guys are supposed to know this: Are 3rd generation Maxima ignition parts compatible with 2nd generation Maxima engines and ECUs? I have Z31 pin compatible box, so I guess it is the same situation as you would have when putting 3rd generation coil and distributor to 2nd generation Maxima.
By the way, in some Nissan ECCS boxes there is a 27C128 EPROM. Removing that eprom (it is soldered) and replacing it with socketed other EPROM containing the correct parameters/software/whatever there is on the chip is supposed to fix the compatibility problems. I haven't tried it myself, and don't know if this works for Maxima ECCS boxes. I got this information from
http://gtr.co.uk/forum/upload/printthread.php?t=8940
Its ECCS box (or ECU) is supposed to be pin compatible with Z31 box, but someone reported that direct swap won't run as it should. The reason why I am writing here is the broken ignition system in the car. The current owner says, that if it worked before he started to repair it, it most suddenly won't work now. I am considering replacing all the ignition parts ( distributor, ignition coil and power transistor) with 3rd generation Maxima parts. You guys are supposed to know this: Are 3rd generation Maxima ignition parts compatible with 2nd generation Maxima engines and ECUs? I have Z31 pin compatible box, so I guess it is the same situation as you would have when putting 3rd generation coil and distributor to 2nd generation Maxima.
By the way, in some Nissan ECCS boxes there is a 27C128 EPROM. Removing that eprom (it is soldered) and replacing it with socketed other EPROM containing the correct parameters/software/whatever there is on the chip is supposed to fix the compatibility problems. I haven't tried it myself, and don't know if this works for Maxima ECCS boxes. I got this information from
http://gtr.co.uk/forum/upload/printthread.php?t=8940
12-12-2005, 10:43 PM
#31
i do have to admit, after looking up 300C's they look very similar to our car, it seems like its trunk is a little longer and then the other small body differences...i have to admit i am really diggin that rear A pillar(?) window....and the grille...wonder if theres a difinitive way to tell if its just an enlongated chassis of our car...i know it or the gloria (or both) are RWD but any way some pics i found of this car:
http://www.motorbase.com/vehicle/by-.../gallery.ehtml
as for the 3rd gen part i think some parts do work but not the ones your talking about, usually the parts that swap need some sort of modification any way...i find it odd a US ECU wont work...but theyre driving on the wrong side of the road over there too....mabe you could get us some pics of the engine and drive train?
http://www.motorbase.com/vehicle/by-.../gallery.ehtml
as for the 3rd gen part i think some parts do work but not the ones your talking about, usually the parts that swap need some sort of modification any way...i find it odd a US ECU wont work...but theyre driving on the wrong side of the road over there too....mabe you could get us some pics of the engine and drive train?
12-14-2005, 01:18 PM
#35
Newbie - Just Registered
Join Date: Dec 2005
Posts: 4
Originally Posted by Niku-Sama
....mabe you could get us some pics of the engine and drive train?
http://www.student.oulu.fi/~gamma/engine.jpg
http://www.student.oulu.fi/~gamma/inside.jpg
http://www.student.oulu.fi/~gamma/side.jpg
12-16-2005, 07:33 PM
#37
that engine bays the same, i know, i have been staring at mine for the past 2 weeks....i have got to see the chassis from underneath now
judging from the engine its pretty much like a 300Z sedan, which is sweet...ho much did it cost and whered you get it from?
edit: on another note
where in the factory service manual does it tell you how to re-calibrate?
judging from the engine its pretty much like a 300Z sedan, which is sweet...ho much did it cost and whered you get it from?
edit: on another note
where in the factory service manual does it tell you how to re-calibrate?
12-16-2005, 11:31 PM
#39
umm count?
http://www.student.oulu.fi/~gamma/side.jpg
http://www.student.oulu.fi/~gamma/side.jpg