Not sure what the problem is. On my 03 silverado I can log the maf to see where it's running at whatever RPM or whatever by opening up the tune while logging and go to the maf table and it will highlight where the maf is running. I tried to do this on my 07 corvette and no matter what I do it won't highlight in the maf table where it's running at. Do I need some other pids selected?