Problem with a 2000 Jeep Grand Cherokee Lmtd 4.7 liter V8 the faults are fuel injectors 2 and 8 If you change these injectors is it recommed to change the rest could i get by with just a cleaning?

Check the connectors to the injectors, use a piece of hose run the engine place one end of the hose in your ear and the other end on the questioned injector and hear then click, if no click probably is bad and will need replacing