4 Attachment(s)
Are my O2 Sensors screwed?
Hi All,
After months of reading, trial and error and help from my tuner ( who has be teaching me, OBI WAN - Padawan style :) ) etc, I finally think I have my SDCL cam tune done. Commanded AFR vs WBO2 AFR were close enough for my liking.
But after re-fitting the NBo2 last night, re-enabling STFT and LTFT etc I am noticing some fairly decent trim figures, along with what appears to be a lazy / failing o2 (Bank2).
Could someone please have a look at the attached log and see if I am looking at this right?
Car is a Holden VXII SS A4 LS1.
Mafless
215 / 223 .604 .610 112LSA 112ICL Cam,
Pacemaker 4->1, 100cpi 4in cats, 3.5in single exhaust.
Custom OS 2
I have attached the following logs for info:
20140922 3rd run was after I had PE etc dialled in to what I believe to be acceptable limits.
20140923 Final is a short run to confirm normal part throttle stuff, and again every thing appears to be in normal limits. Except for some random rich spikes...
20140924 CLSD is this mornings short log, with the WBo2 removed, and the NBo2 refitted back into bank two. LTFT and DFCO re-enabled etc. This is the log that I am shaking my head at in confusion.
20140924 CLSD(1) is another short log that I have done which yields similar info to this mornings.
This tune did my head in for a while, as I wasn't trusting the WBO2 data, as it was telling me that I was lean across the board, despite having done a Calc.VE with the MAF. After much coaxing and further logging etc, I am thinking the Calc.VE I done was crook. The car is driving a lot better, a lot stronger and smells better.
So based on todays two logs, would it appear that HO2S21 is on the fritz? So to me this would throw the STFT and LTFT out?
Thanks in advance
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