Strange STFT fuelling swings

[Cuz]

Hi all,

I'm struggling to track down some very strange behavior regarding STFT swings. I am finding that somwhere along the way in driving my STFTs all of a sudden move from approx -10% to +10% as expected, to mostly -10 to -25%

I can't seem to see what is triggering it, but it happens pretty consistently like a "switch". I don't believe it is linked to transition from OL vs CL fueling.

I have attached logs which the filename designates the time in minutes in the log where this "switch" occurs.

I've also attached my latest tune

Tune https://drive.google.com/file/d/1gzE...ew?usp=sharing
Log 1 https://drive.google.com/file/d/1UcD...ew?usp=sharing
Log 2 https://drive.google.com/file/d/1i6B...ew?usp=sharing
Log 3 https://drive.google.com/file/d/1t0b...ew?usp=sharing
Log 4 https://drive.google.com/file/d/1p8D...ew?usp=sharing
Log 5 https://drive.google.com/file/d/1LdA...ew?usp=sharing
Log 6 https://drive.google.com/file/d/1UlB...ew?usp=sharing

[hjtrbo]

Who done your original tune? Plenty of work has been done to your car by the looks of it. How do you find the car drives? Happy with it?

Your catalyst test is set to enabled. I've never had to deal with it myself but been reading here long enough to know that test will peg the O2 sensors rich.

I've left everything in your tune alone except disabling the cat test and setting up the DTC's the same as mine (LSA R8 Clubby). Dump that in and see how it goes...