How will you know when the inlet air temp. sensor is broken??

It's now hot here in Holland and when the boost comes in at 0.5 0.6 bar it's just like the engine won't go, like the fuel cut's off.

When i'm driving in the evening or night it's allot cooler and there isn't any problem and i haven't got the problem last summer.

Is it possible to check the sensor??

My car is a stage 1 saff.

Maybe i need a rs500 cooler


Cheers for answers