I just started tuning a 1999 camarow ss that has been tuned prior to me. The reason for the re tune is that we just put heads and a cam in the car. I opened the tune and i noticed that the LTFT had been disabled. My question is, what would be the reason for doing this i understand that the LTFT are percentages of STFT and that they are a stored value the the PCM references back to so i guess i could kind of see why you would do this but does it really help you in any way. The one thing that i am seeing is that with the LTFT off my STFT are way out of wack like -15 but when i enable them STFT seam to go down a bit.