AFR adjustments

Originally Posted by Megan370z

first things that come to mind is dirty particle getting stuck to the MAF sensor.

but the next obvious reason is your Intake temps calibration was not adjusted. it is a simple table that you have in the Fuel section section of Uprev. Unless its a Pro feature only which i do not know, the file below is the ROM i had for my 7AT as an example.

Then ofcourse there is a separate Fuel Compensation for Cold which is used if the Coolant is below 70-75C (158F-167F) then it will switch to the main table.