Ecu tuning 2002/2003 g35sedan (very technical)
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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.
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.
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Zach Gaston (05-20-2019)
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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 :'(
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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.
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