cold idle after over nite when really cold

[wildacexxx]

i noticed this when i first swapped the engine but it seemed to have gone away. but it seems that when its really cold it does this. wat THIS is is the engine turns off when really cold. it'll idle for 5-10 seconds then die. i have to give it lil bits of throttle to keep it from dying. wat im thinking is that the engine is being too flooded with fuel. is there anyway of fixing this?
Modified by wildacexxx at 11:30 AM 9/21/2006

[wildacexxx]

could it be my o2 sensor? or maybe a leaky injector? this sux cuz i wanna install a remote start but it'll be useless if the car doesnt stay on. i've also noticed that my bumper has started to get a lil dark, which is from running rich. any ideas would be appreciated.