2001 Dodge Intrepid 2001 dodge intrepid running poorly

2001 dodge intrepid 2.7 v6.
the engine has a big looping idle and the engine acceleration is really sluggish.
ive replace the upper intake manifold,intake gaskets, idle control valve,EGR valve and gaskets, cleaned the throttle body,replace the intake mounting bolts, check the ignition coils and MAF sensor,new spark plugs,oil change,replace all the o2 sensors, i cant seem to get it running right,, PLEASE HELP.