It seems unlikley that it's the injectors,fuel starvation further back down line is my best guess. do the filters and check that the fuel pump(not the injector pump) works properly. On the other hand it could be air getting into the fuel line, lightly pressurise the tank with air and squirt soapy water along the line like trying to find a punture. I use an air line and a load of rags jammed in the fuel filler, just do'nt blow the whole lot to pieces, bon chance mon amie.
Andy
February 2011