Stalling

I have a 2003 Grand Am SE 2.2L 4 Cylinder car. It is a standard. Everytime I take it out of gear to slow down, the cars RPMs go down to 0, and the car stalls. It just started doing it today, before this it was running great.
Its not over heating. SO I do not know what is going on with it. I noticed it one day, the RPM's flexing when I was sitting at an intersection, but I just thought it was adjusting the idle, or the air conditioner was sucking some power.
I did not have the air conditioner on today.
The car has 96000km on it.

Any help you be greatly appreciated.
Thanks

Sorry for the delay responce...

Could be several things...
Check your Idle air control valve on the side of the TB.
Could be a clogged fuel filter, or impurities in the fuel system. Wet or damaged ignition system wires/components.

Bad spark plugs , or even a vacum leak on the intake manifold or a cracked vacum hose.

Btw, A search in the GA forums would have found the same results on this.

Hope it helps.