on my hondata it says my iat is around 238 or so and i thought that was hi but idk. just wondering if maybe it was bad or if there was a way to fix this?

 

Yea, normally 120 is high! We stop doing dyno pulls if it gets above that. I'd check the sensor.

 

could it be from heat soak? If you run your car for a while then turn it off and let it sit, the sensor gets hot from all the heat the engine generated. Then when you start it the s300 will see a high temp because its soaked up all the heat from the motor to the intake manifold. Depending on what you set the air temp/ fuel perameters it will eather lean or richen the fuel mixture.. mostlikely lean tho. because hot air is less dense thus needing less fuel to burn a stoichiometric AFR. But in reality, cold air is going into your motor and the computer is sensing false hot air because it is heat soaked.

just a thought.

 

Are you boosted? If so, what compressor and what size intercooler are you using? When did you see that reading?

I've been monitoring my IAT for over a year, and the highest I've seen is about ~165, sitting in traffic on a hot day.