[] PLEASE HELP!!!! I have a 2002 Mountaineer 4.6 V8 with 56,000 milesthat runs rough when hot. It will run great when started cold, but if shut off and restarted hot it runs awful. It seems to be missing. I have replaced all 8 plugs, 1 coil pack, fuel filter and air filter and cleaned the throttle body.There is no check engine light or trouble codes present.
Has anyone here come across this or a similar problem?
Thanks for your help in advance.

 

Any codes being thrown? You may be going lean since when you are in open loop the engine runs richer till it warms up to go into closed loop running.