Quote Originally Posted by matt5112 View Post
So the MAF calibration needs to be changed in the winter versus the summer?

Where are the coefficients in the PCM to correct for changing IAT in terms of MAF calibration?
Remember we're splitting hairs here.

What would you do if you're doing some serious drag racing? Would you run the same MAF calibration at 40F as 110F ambient temperatures?

If you can convince me that a hot wire MAF can account for it then I'll leave it be.