NoPistons -Mazda Rx7 & Rx8 Rotary Forum

NoPistons -Mazda Rx7 & Rx8 Rotary Forum (https://www.nopistons.com/)
-   2nd Generation Specific (https://www.nopistons.com/2nd-generation-specific-17/)
-   -   Two IAT sensors? (https://www.nopistons.com/2nd-generation-specific-17/two-iat-sensors-64819/)

toplessFC3Sman 03-19-2007 08:45 PM
I've read a few places that the AFM has an intake air temp sensor built into it, yet theres also one (on both turbo and NA) before the throttle body. Why are there two seperate ones? it makes more sense for the turbo, as the air would be a bit hotter after the turbo & IC, but on the NA? Are they used for different processes by the ECU?

j9fd3s 03-20-2007 09:44 AM
Originally Posted by toplessFC3Sman' post='864345' date='Mar 19 2007, 06:45 PM

I've read a few places that the AFM has an intake air temp sensor built into it, yet theres also one (on both turbo and NA) before the throttle body. Why are there two seperate ones? it makes more sense for the turbo, as the air would be a bit hotter after the turbo & IC, but on the NA? Are they used for different processes by the ECU?


the density of air varies with temprature, so the amount of air flowing thru the afm at a given angle, is temp dependent, so they have door angle + temp to give = load. so the ecu kinda looks at these as one number



the other sensor doesnt do much in an na, more in a turbo.


All times are GMT -5. The time now is 09:58 AM.


© 2024 MH Sub I, LLC dba Internet Brands