cold weather"no start"problem..below 20 degrees

1992 lx 2.3 liter, 8 plugger, Car starts fine in temps above 20 degrees, but just cranks and cranks when temps get below 20 degrees. I have tried to spray starting fluid into intake but this doesnt seem to have an effect. The car starts fine when the outside air temp goes above 20 degrees. The fuel pump runs every time I turn the key to run/start. I checked fuel press,and it seems fine.. My idle is set at a base of 800rpm with my tps sensor reads about 0.97 volts. Is the voltage to high? I purchase this car this summer and it has ran fine till this cold snap in the mid west with temps in the single digits for most of the day...I go back to work Monday morning and Im afraid it wont start for me...Please help...

new plugs,wires,icm,.3 months ago.checked spark while running to all 8 wires....still no start when cold..its about 2 degreesF RIGHT NOW IN SOUTHERN iL....a ford mechanic from "just ask" told me to check the IAC. I checked it and hooked it up to a batt to make sure it was operating..it was. when I hooked it back up to the wiring plug harrness on the car it didnt seem to make that clicking sound,but ther is 11.90 volts getting to the plug..It does effect the idle somewhat when I unplug it while its running..so I assume its working correctly....would the ACT sensor have anything to do with this no start cold issue??? Im running out of ideas..