Cold weather warm engine rough idle

[Douglasjjr]

1999 sierra 4.8L z71, no codes...Cold weather, truck starts and idles fine, as soon as engine comes up to operating temp it idles like crap...sounds like its flooding out. Seems to run fine under load and accelerating. Runs fine in warm weather.  Any ideas

[sefiroxx]

Computer runs on preset when warming up. Once warm the computer users input from o2 sensors etc. Get a code reader to see if anything is set or history. Get an better one to see what the o2 sensors are sending back.

[Douglasjjr]

Thank you, will give it a shot