Maybe im a little paranoid but should the fuel trims be off like this?

At Idle
TPS- 0%
STFT B1 - 2.3
* LTFT B1 - 12.5
STFT B2 - 2.3
* LTFT B2 - 8.5

These are the fuel readings from my Innova Live data scanner

my concern is the Long term fuel trims being so far apart?

Potential problem?

 

First, ignore STFT's.... they change about 9 times per second, intentionally dithered above and below 0% to help the cats work.

With regard to LTFT's, they should be close to each other, and not larger than 5%. I'd be just as concerned that they are above 5% as I would that they are not equal. Not the end of the world, but worth doing further scanning and analysis to see if you can determine why the PCM has to add 8.5 - 12.5% extra fuel, above its "standard" calculation, to keep your A/F ratio at 14.7:1.

Are the numbers you quoted the number for the weighted average LTFT's, or are they for a specific LTFT correction Cell? Are all those numbers "positive" - hard to tell since there is a "-" preceding each one?

 

Im pretty sure they are percentages.
And the scanner reads everything on my car as negatives, like Ignition timing reads "-18" at idle and jumps up to "-46" not a wide open throttle but you get what im trying to say

the scanner is reading
LTFT B1 negative 12.5
LTFT B2 negative 8.5

 

I know they are percentages.... but asked if they were they "positive" (+) or "negative" (-)? I doubt your scanner shows everything as negatives. It shows spark advance as a "-" because it is referenced to TDC. Anything "before TDC" is "-".

Since you are saying they are negative, it means the engine would be running rich, if the PCM wasn't SUBTRACTING 8.5 - 12.5% of the fuel it would normally supply.

Again... is the data for a single LTFT Cell, or is it the weighted average of all Cells? Knowing the LTFT's for ALL Cells can sometimes help determine the cause of the problem.

 

I believe its the weighted average of all cells on the individual banks.