I had my G35 Sedan for more than 5 months now and I just noticed that when I pretty much close to floor it my sedan won't change gear. The engine would just roar for like maybe 3-4 seconds before I have to let go of the gas... Usually this happens when I want a quick aceleration whether it be at a stop light or just to pass someone. I would rev it to almost 4000-4500 and it just roars from there. Is this due to the ECU?

 

Bro, an ECU reset is easy to do. Here's a link to a couple.

ECU RESETS

Let us know if it works for you.

<font color=red>GSM</font color=red> <font color=black>Silverstone Coupe</font color=black>

 

I just did the first one and now my check engine light is on and it won't go off. The whole 20miles to work ... that's not good!

2003.5 5AT Sedan Black/Black Premium/Winter Packages

 

You need to turn off the ignition after the easy ECU reset.
When you turn it back on, the light will be off.

2003 Twilight Blue Sedan 5AT, sunroof, Graphite Leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, K&N filter.

 

1) Turn ignition on, wait 3 seconds
2) Push fully and release the gas pedal 5 times within 5 seconds
3) Wait 7 secs, fully push gas pedal and hold for 10 seconds until the CES light starts to blink
4) Release gas pedal (you are in diagnostic test mode 2)
5) Press and hold gas pedal for more than 10 seconds. Release pedal.

so in step 3 you are flooring the car while the engine is on? You are in park? I dont understand this step

Back in Black

 

nismo4090,

NO! Don't turn the ignition on. Turn the key such that the dash lights
are on, don't start the motor. Our G35 have what is called "drive by wire" throttles. That means when you depress the gas pedal, you are
actually instructing the computer to increase gas, not causing a
a wire to pull the throttle open. Please correct me if I'm mistaken!
So in effect all the gas pedal movements are sending signals to
the ECU to reset, not causing gas to fow into the engine.

2003 Twilight Blue Sedan 5AT, sunroof, Graphite Leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, K&N filter.

 

Ok I'll try the ECU reset.... I really hope this helps

 

If you can't get the easy ECU reset method to work,
a 12 hour battery disconnect(negative terminal only)
is a sure fire way to reset the ECU. The G35 really
becomes peppy when the ECU is reset. It is VERY noticable!


2003 Twilight Blue Sedan 5AT, sunroof, Graphite Leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, K&N filter.

 

I tried the easy ECU reset like 5 times and I even used my watch to get the seconds down and it still didnt work. And I cant seem to find any of my tools to disconnect the battery terminal

Back in Black

 

Just installed my new Stillen CAI last night. I performed
the easy ECU reset. Took about 5-6 trys but I got it to
work.

2003 Twilight Blue Sedan 5AT, sunroof, Graphite Leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, K&N filter.

 

How do you know it worked? Should I expect harsher shifts or later shifts?

2003.5 5AT Sedan Black/Black Premium/Winter Packages

 

If you don't notice any difference in your performance,
it probably didn't work. I do believe that we determined
that the easy ECU reset method did indeed work. The
12 hour battery disconnect works for sure. Every time
I have done the easy reset, I have noticed a crisper shifting
on my Auto.

2003 Twilight Blue Sedan 5AT, sunroof, Graphite Leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, Stillen CAI.

 

Well a quick update... I did the easy ECU reset and it made a world of a difference. The shifting is much quicker and smoother. It took me about 6-8 tries but eventually I got it to work and now I'm damn happy. Thanks GUYS!!!!

 

Way to go Darkass! I did it last week when I got my Stillen HFAB
and it took me many tries. I had been able to do it pretty good
prior to last week, but I guess I had "unlearned" it. Has your hesitation
disappeard?

2003 Twilight Blue 5AT Sedan, sunroof,
Graphite Leather, splashguards,
GG/DB red 11 wire Hyper-grounding kit,
350Z intake duct, Stillen Hi-Flow Airbox

 

yes cato, the hesitation did disappear all is well I'm so happy... lol