my explorer smokes when cold or when idle & given gas. smoke goes way after that on 2002 Ford Explorer

It blowes what looks like white/grey smoke when first started, cold & when I stop at a light or first put it in gear & hit the gas but no other time. sometimes it has a small miss while driving. I've changed 02 sensors,coils, spark plugs, value pan gasket. nothing seems to be leaking what can cause this.

Asked by for the 2002 Ford Explorer
Have a combustion leak test performed at most any repair shop, they can tell you more after that!