Hey my rs liberty go something up with it I can't work it out , it's won't go over 3000 rpm and when start to get near 3000 rpm it's shutters and it's dumping a lot fuel to and has no go :/ I've change my fuel pump and fuel regulator and still seen to be play up also change spark-plugs to , so a bit lost on what else it could be , so would anyone know what it could be ?