i have a 95 mustang 5.0 the car runs great when you first start it and its cold but when it warms up it dogs itself lack of power someone told me its because i have no cats and i have the o2 sensors in to but mil connectors it will clear it up is this true or what else could it be[][]

 

you shouldnt have MIL eliminators in... take them out and hook up the O2 sensors normally

 

you have a closed loop failure issue.....running a koer test will let you know if any codes exist related to closed loop operation when fuel calculations and drivibility are all calculated off actual sensor inputs and relayed as output commands to the fuel management system from the ecm