Hitting target AFR, but fuel trims are whacked below ~6.5k HRTZ.

[Stalker L-67]

Below ~6.5k HRTZ on the MAF the LTFT are way out there after the MAF tune. Wide band says everything is good during and after the MAF tune. Moved O2 sensor, was 8" from exhaust port, now its 6" after the header collector and right next to the wide band with no difference.

On the MAF tune I tried Russ K's tune still the same problem.
I have been turning off, closed loop, LTFT learning, and zeroing the LTFT's.
NGK O2 sensor has been CAL has been verified multiple times and has needed no adjusting since the first CAL.

QUESTION:
-Could it be a bad/wrong O2 sensor? Everything is fine until I plug it back in.
-Do LTFT need to stablize over hundreds of miles of driving?

Attached is a quick 1 mile scan.

Any help pointing me in the right direction is much appreciated!

[S2H]

Below ~6.5k HRTZ on the MAF the LTFT are way out there after the MAF tune. Wide band says everything is good during and after the MAF tune. Moved O2 sensor, was 8" from exhaust port, now its 6" after the header collector and right next to the wide band with no difference.

On the MAF tune I tried Russ K's tune still the same problem.
I have been turning off, closed loop, LTFT learning, and zeroing the LTFT's.
NGK O2 sensor has been CAL has been verified multiple times and has needed no adjusting since the first CAL.

QUESTION:
-Could it be a bad/wrong O2 sensor? Everything is fine until I plug it back in.
-Do LTFT need to stablize over hundreds of miles of driving?

Attached is a quick 1 mile scan.

Any help pointing me in the right direction is much appreciated!

I wasnt quite picturing what you were seeing over the phone earlier...
right now in that log your fuel trims say one things....
your wideband is measuring the corrected fuel trims...
I didnt understand that you had fuel trims still enabled while trying to correct with your AFR error

use your LTFT and STFT to correct the MAF
do a copy / paste multiply by % - half

from the looks of that log...its matching up with the fuel trims fairly good....


fuel is trimming.....wideband lines up with what the pcm thinks the o2's want

call me tomorrow if you dont quite understand and I'll explain it better...

[Stalker L-67]

I didnt understand that you had fuel trims still enabled while trying to correct with your AFR error

I think what happened is that I connected to the car turned everything off (closed loop, FT learn, Zero Trims) , got distracted or something and for some reason reconnected to the car and did not turn of the LTFT's..............I seem to recall doing this over the weekend............after the fact, and this is what you get, a good lesson.

Wilco on the PH.

[S2H]

well...glad to know you know what you did....
go and make a custom PID

[sens.114]+[sens.116]

this is STFT + LTFT
then you can use this in a MAF histogram and get all your trims all at once...
from th elooks of It I totally trust the Fuel Trims...they seem to line up nicely with your wideband

definately go and correct the MAF with the Trims and do a double check
rinse lather repeat just like before