Stalls while cold

I just replaced the CPS because the Jeep was always stalling. It ran great after that for a while but now while the engine is still cold it will stall if I get on the gas at all. It is in the 50's here so it is not doing it because it is super cold or something. What could it be? Is this normal?

Can you describe how it stalls? Does it stumble and sputter before quitting or does it immediately die?