2003 zr2 4.3l rough idle only after closed loop and warm
 

Hi new here and I have a 2003 Chevy s10 zr2 with a rough idle after it goes into CL it idles at about 600 rpms after it gets warm not much performance issues when accelerating i have already replaced all gaskets ,spider conversion to mfi system ,new wires plugs, cap, rotor ,ignition coil ,checked timing new break booster, every vacuum line is new fuel filter, cleaned maf pcv is good im leaning to map, iacv or tps but just wanted to see if anyone knew something else thanks .🤔