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Ecu tuning 2002/2003 g35sedan (very technical)

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Old 01-01-2011, 02:42 AM
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I have the entire pin out posted up there...

I forgot about that... out of sight out of mind ....


I will definetly make it a priority to get this done soon
Old 01-01-2011, 12:51 PM
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Emanage (ultimate or blue) both will allow you to tune both air/fuel AND timing. In order for timing to work with the BLUE you will need to have the ignition wire harness. If you have that you can fully tune timing.

I picked up 30 tq and 20 hp with my tune on the eManage.
Old 01-11-2011, 08:10 PM
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So is there a small group of 350z out there with the oddball ECU as well?

We hear about it on our G35s, but where are the "pissed" early ECU 350z drivers?
Old 01-11-2011, 08:21 PM
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^I didn't think this was an issue for coupes or Zs
Old 01-11-2011, 08:46 PM
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any updates??


Here are my 2 cents not that anyone cares


This can be done relatively easy, I'm currently working on it for my maxima but its easier for the 03 g sedans because they are actually set up for the newer style ecu (black ) connector they just got shafted on their ecu. While the maxima ecu actually controls a few more functions and does a few things differently. A 03 g sedan ecu has the same plug type as a 02 03 maxima but it actually dont function the same.


The only issue i seen when i looked into it was the NATS system, even that might work just fine.

What you would need far as i knwo ( i dont have a 03 g sedan to test on)

new black connector style ecu, one that uses factory narrow band o2s

a adapter harness that converts your factory harness (grey) to the new black ecu and puts the wires in correct location.

Then depending on NATS working or not, you might HAVE to get osiris, which could disable nats if it could not function normally. (I think nats will work just fine itll just have to be programed at the dealer)



In the NEAR future im going to explore this more, but id need someone with a 03 g sedan to test.
Old 01-11-2011, 08:52 PM
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^I'd buy a newer ECU if there was an adapter harness available.
Old 01-11-2011, 08:56 PM
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Originally Posted by NFSP G35 View Post
^I'd buy a newer ECU if there was an adapter harness available.
If its possible ill def do it. It def wont be any harder than trying do it in a maxima!


Anyone with a 03g sedan local to NC?
Old 01-11-2011, 09:27 PM
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Originally Posted by 03BaseSedan View Post
So is there a small group of 350z out there with the oddball ECU as well?

We hear about it on our G35s, but where are the "pissed" early ECU 350z drivers?
didnt have issues on the 350Z. when the first 350Z was released the G35 sedan had already been out for 6 months. Nissan "threw" it out the door with the older ECU. Clearly they wanted future models to have the newer and better ECU just didnt care for the new buyer in late 2002 :'(
Old 01-12-2011, 11:18 AM
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If its possible ill def do it. It def wont be any harder than trying do it in a maxima!


Anyone with a 03g sedan local to NC?
Hey SurraTT - I'm in Raleigh with an 03 doggy door. I'm a little scare of what you're going to do with the ECU
Old 01-12-2011, 11:56 AM
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Hey SurraTT - I'm in Raleigh with an 03 doggy door. I'm a little scare of what you're going to do with the ECU


Ohh ok cool, i just moved from Burlington to Greensboro so im a lil further away now. Haha. well basically ill make a harness that adaptes your old grey ecu harness to a new plug the black one, and use a black connector ecu.


I'm not sure how familiar you are with this stuff, and if your car is modded and you want to tune or not. If so a ecu swap to the black connector would be perfect. send me a email if youd like to talk about this more and possible test it out.

Last edited by SurraTT; 01-14-2014 at 07:47 PM.
Old 01-12-2011, 12:41 PM
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Updates are:


Going Full Standalone..

This won't work as the newer ecu handles less functions than the 2003 so you'd have to rewire the entire car.
Old 01-12-2011, 12:45 PM
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What about a partial piggy back using the newer ecu?
Old 01-12-2011, 12:56 PM
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Updates are:


Going Full Standalone..

This won't work as the newer ecu handles less functions than the 2003 so you'd have to rewire the entire car.


What would those be?


What standalone are you going to do?
Old 01-16-2011, 06:38 PM
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???


Any details other than it wont work and need to rewire entire car?
Old 01-16-2011, 06:51 PM
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???


Any details other than it wont work and need to rewire entire car?
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