2000 mitsubishi dion, old with problems

Hello friends of this forum I request urgent help .......... I have mitsubishi dion, old of 2000 engine 4g63 what happens scheme in progress takes to react and more than 3,000 rpm no longer passes and the injectors empies to sound like rattles ... says 3 bar and how much of pressure do these vehicles work? I placed the same thing again and then it went running in 2000 rpm normal but if I pass more rpm no more the engine is suck after 7 km empiesa to turn on the chek turns on and turns off it turns on and turns off like this ..... What could be the problem ???????

It is with real coman