I rewired my AIT sensor today, I didnt have enough time to make a provision on my CAI so I hung it by the filter in the fenderwell for the time being. The car feels slightly more responsive/ stumbles less on the low end in the current 80* weather, but still doesnt pull nearly like it does in 40-50* weather. Does the AIT sensor notice vacuum and the lack of it be the cause? If I decided to go with a resistor, what would be the proper ohm?

Thanks

 

4.7k resist.

 

Thanks

 

The IAT is a thermistor. It only reads temperature and no vacuum. IMO, if you really want to do it right, have programming done to the computer. I prefer to have my computer know what the real temperature of the air entering the engine. That is why they put the sensor close to the throttle body.

 

yup, i agree shoebox

 

Correct me if Im wrong, but Ive heard the IAT sensor absorbs engine heat from the sensors exposed end and the rubber elbow faster than it releases it. Which leads to a much higher temperature reading than what actually exists. I would think the airflow would be so great anyways for the air to pick any temperature up aside from at the metal throttle body. The computer uses the temperature to help figure the density of the air, which I dont think would have much of a chance to expand in such a short period.

 

Maybe that is what you have heard but is there any proof? It's just a little piece of plastic. The part that senses the air is right in the air stream. There is so much air traveling so fast in there that I don't see how it would be skewed to any great degree.

 

This has been a debate for a long time. The way I look at it, it could get heat soaked while standing still. Once you are moving and air is flowing into the motor it's fairly accurate. Your gonna pick up a little heat that unavoidable.

Basically, I look at it is the motor is holding the heat, being that metal takes longer to disapate heat than plastic. So while moving the air is blowing into the motor(into the heat) keeping the heat in the motor. Not at the sensor.

Might not be right, but makes sense to me. I know if I hold a lit torch in my left hand, and there is a fan to my right. When I put my right hand infront of the fan(between the fan and the torch) The air from the fan blows the heat away from me.

Mike