I have seen articles where , for racing performance, guys
substitute a resistor in place of the Air Temp sensor.
They get the resistance value by measuring the sensor when the temp is at 60C and use that value. [ The sensor is a thermistor and changes values according to temp- this, in turn, effects both the a/f ratio and the ignition timing. The higher the temp, the leaner the a/f and the more retarded the ignition ]
This is supposedly when the ECU mapping is the strongest due to the rich settings. Once the car is at factory running temps, they run lean and don't have the performance of the lower temps.
May want to check the inlet air temp sensor values .
I don't have that info at hand, but Jim F web page might.