I am trying to locate where the intake air duct is located on a 2004 ford taurus ses

hi linda.
go to this link might help you to find where it is.
Where is the fuel line located under the hood for 2001 ford taurus ses...

The condenser unfortunately must be replaced from under the car, so the job is best left to a shop with a car lift.

The engine on one end and the air cleaner filter box on the other. See typical picture of a Ford Taurus engine air intake hose.

Check Under wiper rod cover near windsheild where Heather take is air or pollen particule filter

It's located behing the lower kick panel on the passenger side.

Have to install a new boot, etc or the MAF Sensor
won't work correctly.

Engine has no way to measure air flow input,
with a vacuum leak.

Don't use it, until you correct the issue

The location of TPS is to the left air filter / intake duct which attaches to the throttle body.You will see a small rectangular black box ON the throttle body with a couple of wires coming out of it. That is throttle position sensor (TPS). -------This will help.thanks.Helpmech.

It is located under the hood on the passenger side. To get to it raise the hood and remove the clips holding on the black plastic cowl cover that runs under the wipers at the top of the firewall. You can remove the passenger side wiper if you want but i've changed the filter without. The filter is located just under this cover on the passenger side .

It is below the egr valve close to the intake manifold below the intake air sensor, there is a tube running to it from the engine to recirculate exhaust air with fresh air, there is a clamp holding it to the air intake that you need pliers to remove, then you need to turn counter-clockwise 90 degrees to remove, do the reverse to install. to make it easier to access remove the upper intake. The pcv valve is not visible, however, you can identify it by the 3" inch long rubber hose that connects to the steel line running into the bottom of the intake. I have the part and am going to replace it soon, although Ford really makes it difficult to remove it -
pcv valve is located just under the throttle body. remove air cleaner assembly from throttle body and you will see a u shaped hose running horizontally.

if i know what you are asking, look at where you put your oil in. on the valve cover to the top right should be a plug with a tubeing runs to your air clear tube where the air mass sensor and carb is located. i think that is what you are looking for.