NmexMAX

iTrader: (22)

You mean you dont have the pre ECU runs? Hmm... Wonder if any one else does

You sure the sensor’s range is 0-2.55v? I think it’s 0-5v(05’s have wideband O2 sensors)

On my wideband, 2.35v = 14.7 which is stoich, and 2.5 would be quite lean. Lower voltage means rich condition, higher = lean condition.

Air/fuel ratio = 2v+10

chad9350

iTrader: (2)

When did TS get flash for 06?

I called about 2 weeks ego, and 06 w/ wideband 02 hadnt been avail..

Apprec. any info.

madmik

iTrader: (1)

Long term fuel trim Bank1=11.7%, B2=10.1%
Short term trim B1/B2= 24.96% (wow)

I will recheck all my vacuum hoses, EGR, etc since the problem is worst around idle. To detect leaks, someone suggested to spray carb cleaner to see if the rpm goes up. Should work.

If no leaks then TS will have to really adjust the fuel maps. Or I get an AFCII.


[When did TS get flash for 06?]
Mine is an 05. Possible that TS has not done 06' yet.

Apollos2

iTrader: (16)

Hmmm, the ECU flash is starting to sound bit more complicated than most.

If it's a simple swap out, it's still at the top of my list for this spring but if not I may have to hold out even longer. Is TS is actively pursuing fixes to the bugs that the 6th gen seem to be having with their flash?

!PrjctMax!

iTrader: (38)

x 10

madmik

iTrader: (1)

From what I have been reading and observed, large CAI pipes slow the air flow to the MAF. This incorrectly reports that less air is entering the engine which gets the ECU to shorten the injector pulse length (open time) to lean out the A/F mix. The O2 sensors then report a lean condition for which the ECU, using its fuel maps, tries to compensate by increasing the injector pulse length and tracks this deviation via the Short Term Fuel Trims (one for each exhaust manifold). As an engine age, these trims are used to compensate for not so clean injectors, engine blow-by, etc. Mod's that affect the air flow will accentuate this Leaner condition (like my y-pipe) and send the trims way up.

Each time the STFT hits +25% correction, the Long Term Fuel Trim value is incremented by 1%, and the STFT reset to zero. When the LTFT goes above +10% and STFT hits +25% (a Nissan preset limit), the ECU set's a P0171 error condition, SES light and stores sensor data surrounding the error. At WOT, both trims are reset to zero. On a RICH condition, the trims go negative.
L Trims are almost at max between idle up to 3k rpm, close to zero (good) above 4K.

I recleaned the MAF and got the PCV valve connections real tight. Trims are still wild but not enough to trigger SES. My MAF is within specs. I used propane and carb cleaner to check for air leaks. None found.

Nissan low end A/F mix is probably quite lean to give good fuel economy. I suspect Technosquare only adjusts the fuel maps at the high end. I will call them up. They got to fix the low end.

RHMax

I'm not sure which version of TS program some of you have. The version that I have is tuned in my car and A/F was adjusted from low end. You may want to ask since there are a few versions for different ECU models.

NmexMAX

iTrader: (22)

Do any of you have any wideband 02 A/F data?

Puppetmaster

iTrader: (48)

A piggyback is probably a good idea because IMO the amount of precision TS can achieve with the AFR is limited w/o having your car on a wideband or a dyno.

Apollos2

iTrader: (16)

Good work Madmilk. I hope they respond to your feedback.

Sounds like you know a lot about this kind of thing. If the TS flash becomes more of a "plug and play" I am in it next on my list of big purchases as far as mods go. Thanks!

NmexMAX

iTrader: (22)

Nissan shoots for 14:7 in closed loop. (stioch for gasoline engines). The ECU tries to maintain this number via feedback from the o2 sensors.

Read this
http://forums.maxima.org/showpost.ph...7&postcount=87

Open loop is is when the ECU uses feedback from the MAF and CPS for air/fuel corrections.


Read these and you'll know where to tune for with respect to your driving habits.
http://forums.maxima.org/showpost.ph...42&postcount=6
Taken from this thread.
http://forums.maxima.org/showthread.php?p=3287342

madmik

iTrader: (1)

Tek-niq did some back and forth with them to get the correct A/F. They did yours too. That is why I wonder why the fuel maps are still so off at the low end. Its not their first 6th gen reflash.

RHMax

He didn't have a car to tune Tek's ECU. Originally I was suppose to use Tek's ECU but not compatible, so he ended up using my ECU with my car.

madmik

iTrader: (1)

Thanks NmexMAX for the links. I am a bit stubborn and want to understand each component. That is why I bought Autoenginuity. I did notice that the ECU switches to open loop easily, like at 50% load sometimes. With city driving requiring lot of time between 1-2K rpm, I have to get the A/F to a relatively safe ratio.

Technosquare wants some A/F readings for their tech to analyze but he is leaving for Japan Friday. I guess that gives me plenty of time to capture O2 A/F data until he is back in January.

I know a piggyback computer is probably the sane option but the fact that the ECU already has fuel tables, and all the fancy logic, I really want TS to do the job they were paid to do. Then hopefully, it will be plug and play.

NmexMAX

iTrader: (22)

Have you looked into the Cipher from UpRev?

Puppetmaster

iTrader: (48)

At such low rpms, you should be in closed loop (at stoich) so that should be a safe ratio. Unless your data logs are showing otherwise.

Understandable, but I still think there is a limit to what TS can do. Then again, its probably just my skepticism.

Puppetmaster

iTrader: (48)

I thought with that point, he was referring to the TS reflash, not his Autogenuity, being plug n play.

NmexMAX

iTrader: (22)

No, it's not. What is convenient about sending your ECU back to them (TS) every time you add a new mod or alter something that isn't in sync with what they previously programmed for your car, whether it be A/F, timing etc?

http://forums.maxima.org/showpost.ph...7&postcount=20

Unless you have other cars besides Nissan, the UpRev seems to be the superior choice.

Puppetmaster

iTrader: (48)

http://forums.maxima.org/showpost.ph...7&postcount=20



Fair enough. The Cipher interface definitely looks prettier.

But seriously, from what I've seen through 6SpeedHayes and on my350z, I agree with you that it does seem like the better choice for Nissan/Infiniti. Then again, the guys with the Autogenuity haven't posted many details on that aspect of it, although it seems that Larrio likes his a lot. I like both of em just for that fact you can adjust base timing and other things w/o needing a Consult II.

Puppetmaster

iTrader: (48)

WTF, when did you ninja edit to include my link?

madmik

iTrader: (1)

I picked Autoingenuity because it supports most brands via the new CAN protocol, has the SAE J2534 interface and the price. It can report data from any sensor in the car. Great value IMO. Since it supports the latest protocol, I should get 5-10 years out of it.

The pretty Cipher looked too much like bling you show a G35 owner when his/her car is in the shop. Others may be better if you run a business but they cost $$$.

I did get P0171, P0174 SES (lean condition) after the Y-pipe. I cleaned the MAF and tighten a few hoses but still very lean (according to ECU). I will pull O2 readings as soon as I have time. TS needs them.

Nietzsche

iTrader: (7)

Did you purchase the nissan module as well or just the base program? I was looking at getting auto enginuity soon. Do your datalogging and 02 readings come out okay or does it not sample quick enough? And last, do the 02 readings show up as voltage only or do they convert to AFR ie..14.7

Sorry for the thread jack!

NmexMAX

iTrader: (22)

I'm guessing the Nissan enhance since he was able to adjust base timing.


It's rate relies on how many sensors you're logging at once, the Cipher's sample rate is faster. (18mhz)


Raw voltage, no conversion. And it's O2, not 02.

Nietzsche

iTrader: (7)

1ms seems fast enough to me so I was wondering if there where any problems in actual usage-I doubt there would be.


So how do you convert it to AFR? And I'm SOOOO sorry I hit the zero instead of the O

NmexMAX

iTrader: (22)

They claim that as the highest rate, but when monitoring many sensors, I doubt the resolution would be that high.


You have a wideband (06).

The way my WB works is given here.

Nietzsche

iTrader: (7)

By your calculations, 2(v+10), 2.35v=24.7 not 14.7

Are you sure your formula is correct?

NmexMAX

iTrader: (22)

Sorry... I'm in mode today.


A/F = 2v +10

v=2.35

2*2.35 = 4.7 + 10 = 14.7

Nietzsche

iTrader: (7)

Thanks for the equation.

Nietzsche

iTrader: (7)

So the Auto Enginuity would be fine for datalogging wideband, rpm, throttle. The only reason I don't want to go cipher is for the ability to use it on non nissan vehicles.

madmik

iTrader: (1)

So why is the chart in the Max's service manual, page EC-512, showing 1.5v output voltage as stoic? The specification text also indicates that the ConsultII monitor value should 'fluctuate around 1.5v'. The 2.35 V you refer seem to point to the input voltage when testing the sensor wires attached to the ECU. But I could be wrong. So many sensors and so much data.

I got my Autoingenuity for Windows/USB off Ebay for $205 new. Did a bid at the last minute. I then ordered the Nissan Expansion package from the website. You get an email with a code to activate the expansion.

NmexMAX

iTrader: (22)

I was referring to my own personal wideband, (here's the post where I stated it was on my wideband http://forums.maxima.org/showpost.ph...&postcount=441 )not stock of coursee, since my car is only an 03. (Narrow band O2 sensor equipped from the factory)

Yours is an 05, so, I'm sure it doesn't have a stock WB. They came out in the 06 A34 (WB O2's) With all that said, everything I've posted about widebands only refers to the 06 and up models.

Apollos2

iTrader: (16)

So Madmilk, how is the ECU flash working out? Are you still battling lean conditions and SES light?

Would anyone else like to share their "long term" experiences with the TS ECU flash?

!PrjctMax!

iTrader: (38)

+1 on same info

madmik

iTrader: (1)

Like I wrote on other posts, I did not want to buy an Apexi AFC. I drilled a few holes in the MAF sensor itself (pic below) using my Autoenginuity until I got my air/fuel ratio in a decent range (12.5-13.5). No SES light after that. Power is good, especially upper end. Not sure if its the cold weather or the ECU has learned something but the engine pulls real strong mid to high rpm. As soon as the weather improves, I will do another dyno.

DeusExMaxima

iTrader: (1)

My ECU reflash experience is good as well. Love the low end pull and throttle response. I don't like that my cruise control doesnt work above 80 mph. I brought this to Hadashi's attention, but no word on how this is corrected.

NmexMAX

iTrader: (22)

Can you post a graph of AFR vs RPM?

shawndon

iTrader: (2)

Are you using a maxima ECU or the G35/350Z ECU

RHMax

I have no problems with mine at all, including cruise control.

AllBlackMax

Have you tested the removal of the speed limiter yet?

briancopeland

I've been comtemplating the ECU reprogramming as my next upgrade. I'm tired of resetting my ECU every other day and want to get the most out of my Nismo intake (recently installed) and exhaust (probably a Cattman in a month or two. The 10 HP gain by itself is impressive. Of course, the point it to get the most out of the other upgrades without the ECU cancelling any positive gains. Of course, Technosquare does other things to the ECU like reprogram how the throttle responds, etc. that I want as well.

$495 and doing without your car for a few days, not to mention the risk of sending your car's computer across the country twice is not a small deal. I'm happy to hear that it may be worth the time, money, and trouble. Thanks!