roderick

Here is my maf tune cruising. This is what it should look like when done right and when you are ocd.

TVS 80s 2.8 pulley e85
http://www.mediafire.com/file/yw4dmjymnwy/2.8.hpl

csementuh

iTrader: (18)

Soo... your fuel trims are perfectly 0... What's the secret?

My LTFT is off in the tune, and my STFT's are +- 10-20 sometimes at idle even after many many logs with a wideband and adjusting the MAF (MAF only tune).

BLAZIN07SS

iTrader: (7)

basically you have to drive around as smooth as possible and set-up histograms to log it for you. it takes a lot of miles to get everything perfect and in line

roderick

yeppers a 140 miles for me.

csementuh

iTrader: (18)

I've logged mine a ton, but it still won't get that close. The MAF scaling isn't 'accurate' enough get a perfect flow reading down low. How does your idle trims look? You using VE up until a certain RPM? Maybe that's my problem, I'm running MAF only for simplicity. My fuel trims (STFT) are whack even after a lot of logging and tuning. The car runs good and idles fine (although rather rich until warmed up), but my trims bounce a lot at idle and down low.

Intake skewing trims? Bad O2 sensor? Vac leak? Help! lol

Omega_5

Nice log... too bad the trims aren't turned on in the tune...

csementuh

iTrader: (18)

Hmm. I kinda thought this too... But I'm not pro, I didn't wanna call it out..

The factory O2 doesn't switch much tho either so it seemed to be pretty steady state cruising tho, so I dunno...

Omega_5

You can perfectly line up the LTFT's with a bit of precision. On my own car, they line up at about -0.5%, and might vary +/- 0.5% depending on the day.
The STFT's, though, will always change. They are constantly swinging and trimming to take up the slack for the ever changing environment in the intake system. Every time you see the O2 voltage swing off 850mv by more than 50mv, is a point where the STFT's should modify and swing to compensate.

1badBlueberrySC

i got a 2005 lsj to -0.8% over the weekend

Dainslaif

rofl, was wondering how long it'd take someone to point that out.

BLAZIN07SS

iTrader: (7)

lol seriously? i don't have hpt on my work laptop so i didn't see the log

roderick

Trims r off because I am running maf only and I tune basicly the maf. That's the only thing I loged.

csementuh

iTrader: (18)

That log is only a ~60mph cruise. How do the trims look on the low end? Idle and slow cruise?

Omega_5

Not to be a dick... but what's the point of the log then?
If you'd have shown us a cruising + WOT log, with an AFR log (config attached) it would be something to show off... but this is just a steady state log with no feed back.

roderick

I just posted it because of the maf air fuel error. Its spot on like a good tune looks like. My wot is the same way within 0 and -1.

ls1fbody

Let's see a WOT log

Omega_5

Hmmm... you should post a config with your log.

damien

iTrader: (3)

I used a full tank to do mine. From idle to about 5500 they are >1.0%

BanHammer

Disabling LTFT reads -0.8 most of the time. Good try tho.