After starting the car & i put it in Drive it sometime stalls out, why

What is your question?

I crank the car, let it run a couple minutes before I place it in to the drive position and sometimes it will stall upon exceleration. What could be the problem? I've had the idle air control sensor replaced in February and a new catalytic converter last year in June

What makes this problem better or worse?

If I let the car idle a little longer it seems to help the car to not stall out

How long has your 2003 Cadillac DeVille had this problem?

about 2 weeks but it doesn't happen but occasionally