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Discussion Starter · #1 ·
OK, I´d like to install my newly-purchased K&N filter on my 1.9L engine, but there´s still one little thing standing in my way. It´s that darn IAT Sensor (intake air temp) which plugs into the cover of my airbox. The filter I plan to install requires removal of the airbox, so just what DO I do with this sensor?
According to my Chilton manual, that thing ´senses the intake air temperature and sends that information to the Powertrain Control Module (PCM)´, which ´calculates the correct amount of fuel injection.´ Doesn´t seem like I could just unplug and forget about it, without it affecting how my engine runs.
Hey, if you´ve removed the airbox on your 1.9L engine to upgrade the intake, I´d like to know what you did with that IAT sensor. Thanx!
 

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Here´s what my friends do with their IAT sensors. They buy ABS plastic and make a good cold air intake for like 10 bucks, put their cone filter on the end and then pick a spot and drill into the ABS plastic to glue the sensor.

We´ve actually proven that a home made cold air cone intake worked about as well as the 160 dollar AEM one, but it wasn´t shiny and cool.

Believe it or not you can leave the sensor just hanging there and the temp wont be that much different..but I recommend putting the sensor as far away from the motor as possible. If you can actually get the sensor by the filter right where the the filter is getting cold air, you can make the sensor think the air that´s going "into" the motor is as cold as it is where the sensor´s at and it will cause you to run a hair rich and give you a little more power the same way those ebay "+20HP" B.S. things say.
 

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Discussion Starter · #3 ·
So with a cold air intake, the filter is actually down under the radiator?

Does anyone make a cold air intake you know of to fit a 1.9L?

Is there some kinda resistor you can put in place of the IAT sensor so the ECU thinks its there?
thanx!
 

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There are some CAI that look like intercoolers and sit infront of the radiator (I think Iceman makes those ones), some are just a filter that goes into a fender or something.

I think the LX is set up like a GT, so if you pull out all the old OEM extra-weight stuff that goes into the driverside fender there´s a little pocket there thats fairly isolated from the engine compartment. That´s probably your best bet for a CAI.
 
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