Yes, probably temporary. There may have been dirt inside the idle circuit that cleared itself out after you moved the idle screw. Sometimes the carb spray procedure takes a few tries to work, also. The top of the carb is pretty easy to remove, as far as modern carbs go, and can be done with the carb on the Jeep.
If you don't tear the gaskets, you won't need a carb kit. Start by removing the small clips from the choke linkage, the accelerator arm and the fast idle cam. Then remove the 3 small screws from the top bowl cover, (DON"T TOUCH THER ADJUSTING CAM SCREWS INSIDE !!!). Next remove the 6 top cover bolts, and carefully lift off the cover. Remove the gasket carefully,if it stuck to the main bowl. Take out the 2 screws you blew the carb spray through, and remove the venturi assembly. The emulsion tubes are brass and have a very small hole on the bottom end, this is where they plug up. Blow them out with carb spray or shop air, being careful not to bend or damage them.
watch out for 2 small ball bearings, one under the accelerator pump, the other under the venturies, these are for the accelerator pump circuit, remove them out of the carb with a magnet and set aside, (noting where the large one went). remove the return spring for the metering rod vacuum piston also at this time. Watching your eyes, in good ventilation, blow out the carb bowl and jets with carb spray and shop air, if available, until all of the dirt is gone. Reinstall the spring and check balls in their proper locations. Reinstall the top, being carefull to get the metering rods to line up with the main jets, along with the vacuum piston and accelerator pump.
If you suspect dirt entry through the pulse air tubes, you could unplug the hoses from the air cleaner housing. Cap off the housing tubes with corks or plastic caps, the same with the pulse air hoses(or rig up separate small air filters). This would keep dirt and rust from entering the housing and carb again after you clean it out. (The above is for "testing purposes only", as it would not be "smog legal"!!!)
Hope this helps, good luck!