why are my LTFTs running near -12 but the STFT is around -2 to 3? 07 vette

[mvvette97]

I thought I had my 07 corvette dialed in perfect. The last time I ran a log it was staying in the -3 range on the long term trims. Today I drove about 100 miles and it ran great. Got home and thought I would just check it and the long term trims were about -12 or more. That said looking at the data it was running about -2 to -3 on the short term trims. It's like the long term and short term trims don't match up at all. What the heck would be the issue here? I hate this e38 computer.

[joecar]

The LTFT's adjust in a manner to keep the STFT's close to zero.

If nothing in the tune changed, large negative LTFT indicate possible leaky injectors, or leaky FPR.

[joecar]

What fuel are you running...?

Did you change from E00 to E85...?

[mvvette97]

no just using the e10 gas that I have always used. I was quite shocked how the trims were honestly. Car was running great and was getting 30mpg even with the trims like that

[joecar]

Keep an eye on them over time.