This has ben going on for a couple of weeks now but never really bad until today. heres the symtems. car runs great and starts great everytime, but when its warm and sunny out it idles shitty, like around 250 rpm, the first thick line on the tach. the computer usually takes over and doesn't let it stall, just stays real low and sounds like its running on about 3 cylinders. at night, when its cooler out, everything is fine. i have also noticed that my fuel economy has gotten better. the plugs are good and the cap and rotor are fairly new, as well as the fuel filter and i have a new battery too. today is the first day it stalled at every stop light, its hot but not humid out. anybody have any ideas what i can do?

TIA