Hi, Thanks for your replies, I did the job last weekend. I have made this tool, I soldered to a screwdriver a socket wrench 10 and the bolt was easily removed without remove anything more but anyway with a few swearwords :-) http://s10.postimage.org/7onuci461/fotografia.jpg And better I solved the problem, for now, only by cleaning the plugs of the injector wiring loom. Abrantes