Acts like its not getn enough fuel.Have replaced fuel pump,all 4 oxygen sensors,cat converters, injectors are good as well

If your Liberty is experiencing fuel delivery issues despite replacing the fuel pump, oxygen sensors, and catalytic converters, as well as confirming the injectors are good, it could be a problem with the fuel pressure regulator, fuel filter, or a clogged fuel line. Is there a check engine light on? It would be swell to know what code is stored or if any are pending. Also, check for vacuum leaks or a malfunctioning throttle position sensor affecting fuel delivery. Don't hesitate to seek the help of a pro if need be.