Idle at 300-500 RPM?

[thewoahna]

Ok, I got a 90 5-Speed, and lately when I start the car in the morning, it will start fine, and then run good for like 6 second, and then it will stutter and the RPM's will drop. The stuttering lasts only like 2 seconds, then its fine. Once she calms down from her slight hickup and after she warms up, she runs idle between 300-500 RPM. Is this too low? Could this be why she is having these stutters/hickups? All day after this she will run fine, and will start fine all day, but then after I put her away for the night and go to start the next day, the same thing happens. Should I make my idle higher? What should it be at? I thought that maybe it was because my heat/AC was on when I start car, and this caused it cuz the fans would kick on, but they are not on. I had the valves adjusted about 3 months ago, and I was going to reset my new (2 month old) 92 EX ECU, and get some fuel injector cleaner. Whats the Dillio with this? Anyone got any how-to fix? My baby is sick and I need some chicken soup please!!