Is the IAT and MAF sensor the same?
IAT (intake air temperature) is NOT a MAF (mass air flow) equivalent. Your car uses a MAP (manifold absolute pressure) sensor in place of a MAF.
Do I need an IAT sensor?
An IAT or MAT sensor is only necessary if you want to be able to use Charge temp estimate for fueling (used for all fueling modes in latest firmware), or make corrections for abnormal IAT (a great idea). It can really help make fueling more consistent over a wider range of operating conditions.
What is normal IAT?
These temps you are getting are normal. IAT is intake air temperature, at start up it will usually read what the ambient temperature is outside. As you drive and your engine becomes heat-soaked your IAT temps will rise; depending on the outside temperature.
What’s a good intake air temperature?
175 to 180 degrees will give optimal economy that I’ve seen. Over that I seem to lose too much power, possibly due to spark retard from ping. If you can get 175 degrees, you can calculate the difference in fuel consumed by taking the percentage of weight reduction of using the hotter air.
Can intake air be too cold?
The intake air at full boost is really high as was already said. Unless you got it cold enough to drop cylinder temps to the point that it wouldnt light off. Or possible, if the humidity was high enough it could cause the liquids to drop out and cause issues with a freeze up.
What is intake temperature sensor?
The Intake Air Temperature sensor (IAT) monitors the temperature of the air entering the engine. The engine computer (PCM) needs this information to estimate air density so it can balance air air/fuel mixture. Colder air is more dense than hot air, so cold air requires more fuel to maintain the same air/fuel ratio.
Does IAT sensor affect AC?
The faulty IAT sensor tells the car’s computer that the air in the intake is a different temperature than it actually is and may cause the vehicle to not deliver the proper fuel mixture to the engine. Your heat/AC will freak out but there will be no effect in the engine.
How does IAT sensor work?
The IAT sensor is a variable resistor that changes with temperature. The higher the temperature, the lower the resistance and vice versa. Using a 5V reference signal (sent by the ECU – Engine Control Unit) the resistance of the IAT sensor will decrease the signal in proportion to the colder air temperature.