Timeline for How Much Deviation from Ambient Temp is Normal for IAT sensors?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Feb 12, 2015 at 7:56 | vote | accept | Robert S. Barnes | ||
| Feb 2, 2015 at 23:11 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | The easiest way to check your IAT to ensure it is giving you the correct temperature is to test it. Every IAT has as set of values (range) which corresponds to the temperature. For instance, the Camaro I used to own has a resistance value of 177 ohms @ 100degC. It has 9420 ohms @ 0degC. The chart I am looking at has 15 steps between the two values, but I bet you could translate an exact value for each degree of temperature (whether C of F). I would bet most (if not all) IATs work the same way and have a corresponding chart which would make testing one pretty easy. | |
| Feb 2, 2015 at 18:33 | history | edited | Zaid | CC BY-SA 3.0 |
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| Feb 2, 2015 at 18:14 | comment | added | Zaid | @RobertS.Barnes : It's not really that surprising. When you drive, the fresh air coming into the engine bay has a cooling effect, which reduces the amount of heat soak felt by the IATS | |
| Feb 2, 2015 at 18:08 | comment | added | Robert S. Barnes | So basically the air entering the engine really is that hot due to it basically being preheated by the heat coming off the engine bay? Another thing I noticed is that the IAT slowly drops from 20+ to about 7+ when I start out with with a hot engine. I started out this evening with ambient at 16, ECT at 48 and IAT at 39, and after about 15 minutes of driving I had ECT 79 and IAT at 21. That's a bit weird... | |
| Feb 2, 2015 at 16:40 | history | edited | Zaid | CC BY-SA 3.0 |
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| Feb 2, 2015 at 16:34 | history | answered | Zaid | CC BY-SA 3.0 |