Just wanted to make a post to thank all those that answered my questions about my fueling issue after installing a JLT. Come to find out I had a sizable exhaust leak that Was causing the car to go lean. I just couldn?t hear it because of normal exhaust noise. Once I got that patched up I put my MAF values back to stock. Both flow rate and period. Then used percent difference to find a constant to multiply my MAF curve by as a base. Let the car idle in park for 5 minutes logging long terms, then handbrake on in drive(to load the motor at idle) for 5 minutes. Stopped the log control C, the recorded histogram the paste special, multiply by percentage. Loaded tune. Logged Long terms again. The values where not more than +\- .8 then drove the car for 20 minutes at varying rpm and load, rinse washed repeat, now my long terms average less than 1% correction and my short terms average between 2-5% correction average. Thanks murfie, veefour, decipha, crank automotive and who ever else made suggestions. Such a stupid oversight to not check for exhaust leaks.