Renault 2.2 dci fuel loss

Hello friends, here I write to another problem again, it turns out that four days ago fuel began by some small "plastic distributors located on the injectors, these devices are fixed with a clip to the rest of the injector, I attach a photo to clarify.
They would greatly add their comments or if anyone had a similar problem.
Thank you

Hi Alfredo2264, that is the returns of Gasoil, surely, or is not well involved, or a Torira Board has been damaged that carries at the tip (inside), disassemble it to see. Greetings!!