2004 ECU updates..
Registered User
Joined: Jun 2004
Posts: 2
Likes: 0
From: Cali
Re: Re: Re: Question
Originally posted by TECHNOSQUARE
It's actually quite the opposite. With most 2004.5 and newer, we've found them to run dangerously lean after adding mods. From the factory, the cars are lean to begin with.
If his build date's 07/03, then it is still the 2003 ECU and not the 2004.5 version. Those started from 10/03 and on.
We are very close to releasing the 2004.5 ECUs for the 350Z and the G35's.
It's actually quite the opposite. With most 2004.5 and newer, we've found them to run dangerously lean after adding mods. From the factory, the cars are lean to begin with.
If his build date's 07/03, then it is still the 2003 ECU and not the 2004.5 version. Those started from 10/03 and on.
We are very close to releasing the 2004.5 ECUs for the 350Z and the G35's.
Originally posted by neffster
GREAT QUESTION! I was going to ask the same thing but since the 2004.5 G35 reflash isn't working yet, I thought I'd wait for a more appropriate time.
Does TS recommend that we unscrew the passenger side Oxygen sensor and do several runs? I've read that unscrewing the passengers side sensor will allow you 5 to 10 runs before the ECU freaks out. I've also read that the tail pipe, sniffer method, is very inaccurate. What is the suggested method?
GREAT QUESTION! I was going to ask the same thing but since the 2004.5 G35 reflash isn't working yet, I thought I'd wait for a more appropriate time.
Does TS recommend that we unscrew the passenger side Oxygen sensor and do several runs? I've read that unscrewing the passengers side sensor will allow you 5 to 10 runs before the ECU freaks out. I've also read that the tail pipe, sniffer method, is very inaccurate. What is the suggested method?
A tailpipe sensor or screw in type wideband O2 sensor is only as good as its life span. Both being new I've seen variances of only 0.1 A/F ratio.
Originally posted by blascelles
Weld in a bung. If you are serious about tuning, you'll need do it anyway.
A tailpipe sensor or screw in type wideband O2 sensor is only as good as its life span. Both being new I've seen variances of only 0.1 A/F ratio.
Weld in a bung. If you are serious about tuning, you'll need do it anyway.
A tailpipe sensor or screw in type wideband O2 sensor is only as good as its life span. Both being new I've seen variances of only 0.1 A/F ratio.
Originally posted by jreiter
You've seen a pre-cat a/f sensor show the same reading (within .1) of a post-cat tailpipe sensor? That suggests to me that a/f sensors sense something *other* than what a cat burns off. I gues s that's contrary to my (somewhat limited) understanding of catalytic converters.
You've seen a pre-cat a/f sensor show the same reading (within .1) of a post-cat tailpipe sensor? That suggests to me that a/f sensors sense something *other* than what a cat burns off. I gues s that's contrary to my (somewhat limited) understanding of catalytic converters.
Originally posted by blascelles
Weld in a bung. If you are serious about tuning, you'll need do it anyway.
A tailpipe sensor or screw in type wideband O2 sensor is only as good as its life span. Both being new I've seen variances of only 0.1 A/F ratio.
Weld in a bung. If you are serious about tuning, you'll need do it anyway.
A tailpipe sensor or screw in type wideband O2 sensor is only as good as its life span. Both being new I've seen variances of only 0.1 A/F ratio.
Basically I'm trying to figure out how TS will be able to "adjust" the ECU to work ideally for my vehicle. How do they tune a car that is over 3000 miles away? I would think that there is a SPECIFIC way that they want the A/F data gathered and a SPECIFIC location that they'd want the A/F data taken from.
Originally posted by blascelles
I did not mention cats anywhere.
I did not mention cats anywhere.
Originally posted by neffster
Don't most people weld in a bung BEFORE the cats? If this is the case, how do I compare the A/F curve from the pre-cat location to the tail pipe sniffer, post-cat location? Even a high flow cat will make the readings differnent, right?
Don't most people weld in a bung BEFORE the cats? If this is the case, how do I compare the A/F curve from the pre-cat location to the tail pipe sniffer, post-cat location? Even a high flow cat will make the readings differnent, right?
Originally posted by neffster
Don't most people weld in a bung BEFORE the cats? If this is the case, how do I compare the A/F curve from the pre-cat location to the tail pipe sniffer, post-cat location? Even a high flow cat will make the readings differnent, right?
Basically I'm trying to figure out how TS will be able to "adjust" the ECU to work ideally for my vehicle. How do they tune a car that is over 3000 miles away? I would think that there is a SPECIFIC way that they want the A/F data gathered and a SPECIFIC location that they'd want the A/F data taken from.
Don't most people weld in a bung BEFORE the cats? If this is the case, how do I compare the A/F curve from the pre-cat location to the tail pipe sniffer, post-cat location? Even a high flow cat will make the readings differnent, right?
Basically I'm trying to figure out how TS will be able to "adjust" the ECU to work ideally for my vehicle. How do they tune a car that is over 3000 miles away? I would think that there is a SPECIFIC way that they want the A/F data gathered and a SPECIFIC location that they'd want the A/F data taken from.
That is what they are trying to figure out with my ecu. Technosquare has had it about 2 weeks now, hopefully they have gathered some important info. Also, if they tune your car according to the atmospheric readings on your dyno sheet, you should be fine as long as you dont run your car very hard in a completely different climate and altitude than the dyno is.
Originally posted by jreiter
My thoughts exactly. I look back on all the cars (with cats) I've watched being dyno'd while using a tailpipe sniffer, and I wonder what good that a/f reading was. Seems like it's worthless now that I think about it.
My thoughts exactly. I look back on all the cars (with cats) I've watched being dyno'd while using a tailpipe sniffer, and I wonder what good that a/f reading was. Seems like it's worthless now that I think about it.
The reading is not necessarily worthless. You'd have to log your test conditions. Cat mileage, how many runs on the sensor, etc. I'm sure someone has dyno'd with a relatively new car, with both a pre-cat sensor and tailpipe sniffer.
Originally posted by scz
That is what they are trying to figure out with my ecu. Technosquare has had it about 2 weeks now, hopefully they have gathered some important info. Also, if they tune your car according to the atmospheric readings on your dyno sheet, you should be fine as long as you dont run your car very hard in a completely different climate and altitude than the dyno is.
That is what they are trying to figure out with my ecu. Technosquare has had it about 2 weeks now, hopefully they have gathered some important info. Also, if they tune your car according to the atmospheric readings on your dyno sheet, you should be fine as long as you dont run your car very hard in a completely different climate and altitude than the dyno is.
I wonder what internal systems are CAN or not.
Registered User
Joined: Sep 2004
Posts: 46
Likes: 0
From: Cali
Re: 2004 ECU updates..
Originally posted by Chebosto
Some info from TechnoSquare...
Tadashi has successfully "cracked into" the 2004 ecu program code. He is now attempting to get backward compatability with existing hardware to work with the new format, that Nissan has given to the 2k4 ecus... it seems like that the 04 ECUs are specifically made for the USA and is "one of a kind." No one else in the world runs this ECU. You may thank US emission laws.
Tadashi is still in Japan and hopefully when his health is better, he will come home.. X your fingers for the best, for both him and the new ECU development..
--Cheston
Some info from TechnoSquare...
Tadashi has successfully "cracked into" the 2004 ecu program code. He is now attempting to get backward compatability with existing hardware to work with the new format, that Nissan has given to the 2k4 ecus... it seems like that the 04 ECUs are specifically made for the USA and is "one of a kind." No one else in the world runs this ECU. You may thank US emission laws.
Tadashi is still in Japan and hopefully when his health is better, he will come home..
X your fingers for the best, for both him and the new ECU development..--Cheston
Cheston
do you know if they have the flash for the 2004 G35 w/ Greddy Twin Turbo?
Originally posted by Zexy
Will Technosquare do the job right period?
I'm checking out some threads with complications even with the 03 ECU's making the car run lean.
Will Technosquare do the job right period?
I'm checking out some threads with complications even with the 03 ECU's making the car run lean.
