I have run a few scans since my header install and I'm running between a +3% to +11% LTFT. It only goes a little negative when Im punching the throttle. Im pretty sure before my header install my LTFT %s were -3% to +3% or so. My tuner guy said I could bring the car in to have the MAF tables readjusted... I was hoping it was that simple but after reading about 2001+ vehicles having a cat diagnostic test run with the rear 02 sensor I began to think there was a correlation. However, I'm running lean, not rich. I had the sensor in before the headers but unplugged it completely when I installed them. P0420 (or whatever the rear 02 code is) was deleted during my tune and as I said before, my LTFT looked pretty close to zero pre-headers. Any help is appreciated.
