mourad, maybe it's cuz you drive more carefully... normally cars run richer in cold weather, that's why we have intake air temp sensors... to determine if it's cold. lean cars don't start in the winter. EVERYONE loses mileage in the winter... plus most ppl idle their cars longer too!

 

So could it really be my intake air temp sensor? Is that the sensor that plugs into the short ram before the short ram joins the throttle body? How could I test it out?

 

it has a voltage range... probe it with a multimeter and check the voltage against current temp as laid out in the Chilton manual... then hold the IAT between your fingers to warm it up, and see if the voltage changes consistently with the increase in temp.

 

Why is that so bruno? Lean because cold air = dense air = more fuel to compensate?
I keep my car in the garage in the winter so she starts up easy. That's with a cold air intake that sux deep inside the bumper. I would swear I get better power too.

What's a good multimeter run for? Something with a relatively high voltage range - that can also be used in home wiring? And where too? CT? WalMart?

 

ya you can find some nice ones at CT, radio shack or home depo..

well an engine needs more fuel to start when its cold, like a choke on a carb...

thats why the car seems allot more peppy till it warms up!

 

From the Honda Civic manual that I downloaded the other day, it says the IAT is a temperature-dependent resistor. Can I just take it out from the car and check its resistance against the chart? Would that do?

Thanks!

 

You can do that, or if you leave it hooked up, you can check the voltage coming back from the sensor.... the IAT gets a 5V reference from the ECU, and then in returns a value back to the ECU after it's gone through the resistor. You can do it either way.

Cold air makes more power Cars are hella peppier in cold and dry conditions. Humidity reduces power output as well.

 

kapish

 

manual
tis as old as the car....8 years old