Are these fuel trims right?

[92tsifwd]

ftrl 87.5%
ftrm 100%
ftrmh 100%

I have tuned for no knock but am getting really low 02s.

02r ranges between .20v and .87 through the curve

02f 2.18v all the time.

I have tuned and am getting no knock but my 02s are still low. why? I thought the perfect fuel trim was 100%
So would 87% be lean? I was getting 45 deg of timing peak timng. I am new to datalogging so some help I would apriciate. I can post more info if needed.

 

[awdrst]

anything under 100 means its running rich.

 

[92tsifwd]

Ok, why are my 02s low then? espeshaly at low rpms like .20s? Bad o2 sencor? What is a good way to know if you are rich or lean at idle when trying to tune? Should I worry about the low o2s cause I am not getting any knock?

 

[awdrst]

i usually tune 1g's for no knock as long as you knock sensor is working. I dont usually trust narrow o2's for tuning.

 

[Mackzero]

I use the narrow band output off my PLX-M300 and my fuel trims are low also, but my Wideband says everything is good, so I just don't worry about it. As long as you are in the 70s you will be o.k., you might want to try to lean it out just a bit though if you can.
Good luck.

 

[92tsifwd]

Ya, the knock sencor is new so I trust it. I will not worry too much about the low o2s then or do you think my stock 02 sencor is bad? No codes.