What and where is the IAT sensor on an 05 honda civic ex?

Question

I bought one of those fuel saving resistors from ebay and it says to connect to my IAT sensor.

Answer 1

the IAT is on the left (driver's) side of the intake manifold directly below the throttle body/throttle position sensor.
if you stand on the driver's side of the car with the hood open and look directly at the throttle body you'll see the connector for the IAT directly underneath.

hope that helps

Answer 2

Don't install that "fuel saving resistor" - it will run the resistance low to give your engine the illusion of hot air - which will make the injectors not pump as much. As a result your car will lean out - use less fuel.

But that's what you were aiming for, right?

No. As a side effect, there's 2 new problems created.

A) A car that's running rich/lean (improper air/fuel ratio) isn't running well, it's stumbling, don't be surprised if your engine starts stuttering or feels weaker, it's very bad for the engine's performance, performance isn't just gaged by speed, it's gaged by fuel economy too. Better performance = better gas mileage, when your engine is running like crap, you will get crappy gas mileage. It's not worth it.

B) Running your car lean will increase the chance of tossing a rod (blowing the engine). It's not safe for your engine, which is why there's a disclaimer on the page if you look hard enough. You do not want that on your car, all it will do is lean out your a/f ratio in hopes of gaining a mpg better or so (assuming ur not on the gas hard) at the cost of major engine wear (as your engine struggles to keep up with the "hot" air it thinks is flowing through your engine.

Engines perform better in the cold air due to it being more dense, condensed, and having more oxygen making a more efficient combustion. An IAT resistor will just make the injectors pump less, it's a hack, nothing more. And like most hacks, it has a major ability to kill your engine. The performance obviously won't be there either, as the engine will be stuttering and stumbling all day long to try to maximize efficiency.

Basically you're fighting the computer - and you won't win, do your car a favor and don't install it, be lighter on the gas and shifter earlier if you want better gas mileage...