nycgps

iTrader: (1)

Aww, that sucks, there are probably a "failed safe" setting somewhere that triggers it?

I wonder if vesatuner has it

Bob The Eskimo

Hello all,
I've purchased the MazdaEdit software as well, but I asked epifan a series of questions first. Their (his) response may answer many of the questions swirling here. The response is below:

Hello


How much does the Pro version cost for an individual? I'd like to use it on my Rx8, my wife's car as well as the new one that I'll purchase in the coming months.

mazdaEdit Pro cost $899. I would recommend to you Personal version for your RX8

Your website shows supported vehicles. Will the system only work for those vehicles, or do you only provide customer service support for those vehicles?

Only for listed vehicles

Will the ecuEdit work with Mazda vehicles, or will mazdaEdit work with vehicles other than Mazda?

ecuEdit for Subaru Turbo and Mitsu Evolution, mazdaEdit for Mazdas

If the software is installed on a laptop, and the laptop dies, can the software be re-installed on another PC without issue (as long as maps are backed up)?

Yes, you can install software on all your PCs

Regards

Bob The Eskimo

Hello all,
I have been capturing logs using MazdaEdit and have noticed an issue I can't resolve. I've checked the box to capture injector pulse width and the pulse continues to read 0 when I get into higher RPM's I occasionally get a blip to 0.1 but that's all. Has anyone else noticed this? The only change I've made to my injectors is a 11% decrease in B1 size for running lean at idle.

Also, I've captured logs and from 1500 up to 6000 rpms at cruise and built the MAF scaling table Kane describes in the videos. 1500-4000 looks good, but I'm running lean when I go into open loop. It seems to fluctuate a bit, but it's not linear so I think it's the Injector bank 2 and not the MAF. Can someone please take a look and let me know their thoughts? The file is in txt, but please change to xlsx.

Thanks,

Bob The Eskimo

I re-logged it just to make sure. Same txt to xlsx file extension change.

Brettus

iTrader: (2)

Convert your files to something we can seee directly in your post if you want them commented on .
I don't know where you got your info from ...... but if you are scaling the stock red injectors in the stock location .............. you are doing it wrong .

Bob The Eskimo

I thought my changes were wrong as well so I went back to stock and started again.

I re-logged idle, and adjusted the MAF to get 5.5 g/s at idle (roughly a 9 % increase). I was also running lean and needed a 6% decrease in my Injector B1 to get the trims near 0 at idle (my injectors have 170k miles on them so I'm not surprised there's age fatigue, and I also have a pettit engine if that matters). From there I logged the following.

Also, back to the ME questions, has anyone using MazdaEdit found a way to log injector pulse width?

logalinipoo

Bob, You should not be adjusting your MAF to hunt a specific g/sec. You probably have a problem that is causing your g/sec to be low.

Bob The Eskimo

Could you provide some background information as to why? Kane said that all Rx8's he's tuned without radical modifications to the intake system idle at 5.5g/s. Mine's bone stock except for the removal of the vfad and a drop in K&N filter. Also, if your statement is true, and Brettus' remark is true as well, why is my idle not accurate? There are only two variables at idle.

Thanks.

logalinipoo

That is exactly why. It should be idling about 5.5g/sec. If you are on a stock tune then you most likely have a problem that needs to be fixed. Just adjusting the tune does not fix the problem. It only masks the problem. Then you adjusted your injectors and now they are not correct which will throw off your entire tune.

Bob The Eskimo

Do you have any ideas as to why the idle would be off? Compression (engine has 60k on it with premix)? Vacuum leak? Dirty MAF (cleaned less than 5k miles ago)?

The other thing I noticed is that Idle (before alteration) without AC hovers around 5 g/s. However, idle with AC on hovers around 6.0.

logalinipoo

well ac will put more load on the engine and require the additional air. I would guess Vac leak. It is pulling in air that is not going past the MAF. so the MAF does not show it and the car does not add fuel.

What was your combined fuel trims before you scaled the MAF and after. I would guess it went down.

Bob The Eskimo

It did go down. Prior, LTFT was about 6. After LTFT was about -0.78
Let me open the hood and do an analysis quickly. Thank you for the help.

Also, anyone for the injector pulse width question???

Brettus

iTrader: (2)

I have not found a way to log it . I asked epifan ages ago to rectify this but it was low on the priorities at the time and never got done ........ as farr as i know .

dannobre

iTrader: (3)

It doesn't give you a number that has any meaning...not sure where the Accessport gets the number...but it is useless..

You tune for the output that you want...and you really don't have total control over things anyway

Brettus

iTrader: (2)

yeah ........... we don't really need it , which is why i never pushed for it .

Bob The Eskimo

Makes sense. I was just curious to see the pulse width change as the other injectors open up so I know at what RPM they kick in.

Another issue I've come up with is the log speed. I've been able to capture cruise logs quite well because you can cruise here in FL up and down A1A and US1 easily for long distances. However, when I start to log Wide open throttle there's a finite amount of time before you run into redline. At the current log speeds I'm guessing I'll only get a few (10-20) data points on each WOT run. I've adjusted the capture speed as high as it will go in MazdaEdit, and I've disabled all of the non-essential log items, turned off other programs and it still isn't very fast.

Has any one found a good way to speed it up?

Is the Tactrix log speed faster? Perhaps I can log directly into the tactrix and interpret later...

thewird

That's more then enough data points for WOT lol.

thewird

Brettus

iTrader: (2)

I did all the above as well and get 4 data points per second . Seems like enough for me .

How many parameters ae you trying to log at once? .... I log 13 in total.

auzoom

The OBD-II standard limits the refresh rate to roughly 3 times per second. This is the specific except from the SAE J1978 standard:

"The minimum bus idle period before the external test equipment shall transmit an address, shall be 300 ms."

I have the 2002 (APR2002) documentation, so this may have changed.

Bob The Eskimo

I figured out the slow log rate on my software. I was capturing about 1 frame per second at best and capturing about 8-9 columns. I got rid of a few things that the Rx8 doesn't monitor such as Desired RPM, O2 short term trim (i forget the banks), and the log speed went through the roof. I believe the system was trying to wait for data that never comes in, and bogging itself down. Problem solved; now it logs almost faster than i can decipher on the dashboard.

Bob The Eskimo

I went back to stock again and logged 1500-4000 just for ***** and giggles and everything seemed waaay out of line until I noticed something that makes a huge difference. The MazdaEdit software has several different Short term fuel trim sources (eg. O2, B1, B2, OBD, etc.). Most of the STFT monitors don't log anything at all. I've been using the STFT B1 OBD as shown in the picture below to tune my previous changes. These numbers range in the 10-15% off range frequently which led me to 9% MAF and 6% Injector 1 changes. However, when I logged the O2 STFT line (as seen in the pic) I get much more normal/reasonable changes. Perhaps I've been logging the wrong STFT in the past and making changes that didn't need to be made. The crazy part is that they both drop to 0% in Open loop.

Can anyone provide guidance as to which STFT I should use? I'll post this question in the MazdaEdit thread as well.

Pic Descriptions:
MAF stock O2 = using the newly found STFT O2.
MAF Stock = using the STFT i've used thus far in the tuning process (I now think is the wrong one.
ME log categories = shows the categories I have logged on runs, and the two different STFT columns.

Brettus

iTrader: (2)

These are all the parameters I log .



If you are making adjustments based on what the STFT is doing .................. you are doing it wrong .

Also , why are you touching the injector scaling on a stock injector ?

Bob The Eskimo

I'm not making changes based on STFT. I'm making changes based on the sum of STFT and LTFT as Kane instructed in his videos. If it's a steady amount off at various RPMs it's the Injector, if it's a varying percentage across RPMs it's the MAF.

I adjusted my stock injector because after I adjusted my MAF to what appears appropriate levels, the fuel trims weren't yet right.

It appears the STFT B1 OBD that you use is the same one that I was using to begin with, so what does the STFT O2 B1 mean? is that one more correct or inaccurate?

I noticed my Cat runs cooler with the stock tune than the tune using STFT B1 OBD so that makes me believe that using that STFT B1 OBD information is not correct.

Also, if my LTFT is only about 3.12, and I've driven well over 400 miles on stock tune and my STFT's are still at 10-15% using the STFT B1 OBD, that leads me to believe that the MazdaEdit STFT B1 OBD is not the one that feeds to LTFT. Perhaps we're using the wrong STFT source to feed into our tune...

But I'm a novice, so I'm learning as I go...

Brettus

iTrader: (2)

Wow ...your method is so **** . It doesn't need to be that way ........ takes me about an hour to street tune any NA rx8 - unless there is something wrong with the car.

IMHO STFT should not be used AT ALL for adjustments you have to make . If a car comes to me that has been driven around for ages since the last ECU reset I know LTFT is all I need to look at to decide what changes to make to the maf . If it has been reflashed recently i might reference stft but only as a guide to see where ltft will trend. If LTFT is really high ......... something is wrong and I look for a cause ...... It is rare that the injectors are the fault. But if they are the problem , fix them ! Don't make a tune to work around it because more than likely you will have the situation where one is down and the other is normal. Which would be bad if you tune to 'lean best torque'.

I never scale OEM injectors . Mazda did a good job of that for me so why introduce another unecessesary variable into the mix? Stock Injectors don't vary enough to make it important . I tend to only scale injectors when they are not stock (IE ....FI tunes)

Kane

iTrader: (1)

After seeing dozens of flow matched injector reports, I would tend to disagree. The factory tolerance seems to be +/-10% more often than not.