2000 Ford Explorer cold starting

Every morning doesnt matter the time of year although it is worse in the winter, the car wont idle on its own. I have to keep working the throttle and keep it working. It runs rough untill it reachs normal temp.

I had a tech tell me to replace the lower O2 sensors and the tpi motor, I did and didnt solve a thing.

Any ideas out there, I would really like some help.

Thanks,
Luis