Mazda3Club.com : The Original Mazda3 Forum

Mazda3Club.com : The Original Mazda3 Forum (https://www.mazda3club.com/)

- 3rd gen Engine/Drivetrain (https://www.mazda3club.com/3rd-gen-engine-drivetrain-57/)

- - IAT Mod (https://www.mazda3club.com/3rd-gen-engine-drivetrain-57/iat-mod-6785/)

Quote:

Originally posted by Sil_Pro5
faking the ECU into thinking that the air its ingesting is ambient (not cold guys, cause' technically it should be called Ambient Air Intakes) temp. air would not make the idle 'crap' when the engine is cold. idle would be affected by other variables like, the MAF reading, throttle position sensor, etc. the IAT does not control how or when the engine 'warms up'; that the job of the thermostat. once it reads 160 or 180 degree, it opens and lets in coolant to keep the engine temp in range.

Not quite. Fuel mixes with warmer air better than colder air, meaning that an engine (generally) needs a richer mixture with colder incoming air. During the time before the engine warms up and heats the intake air, the IAT sensor tells the ECU how much fuel to inject. If the amount of fuel is wrong, the idle gets bad. This is one reason why this mod may result in a "Check Engine" light.

Also, to address another post, intercoolers don't benefit N/A engines. N/A engines don't significantly heat the intake air because they don't pressurize it. The intercooler will create an intake restriction that will outweigh any hp gain you will get from the slightly cooler intake air.

Quote:

Originally posted by macdaddyslomo
wtf??? totally not my question...can anybody actually tell me where the IAT is on my 1.6L

You got the answer "DO not mess with the IAT!" , slomo, you'll get "check engine light" on and driveability will suffer. I learned it hard way, wanna try it too?
So I told you everything you need to know and I will never help with mod which will have negative effect.
Alex

WAY OLD THREAD I KNOW. But i was doin a search and came across it. -obender66- i don't know if you ever got the answer to your question but -Sil_Pro5- was right in a way. However yours isn't in the manifold its in the MAF.