Accelerator problems.

Good morning, my question I think it will be easy. I have a Nissan First P11 2.0 TD of 1997, which for a few days is giving me problems with the accelerator. At times it does not exceed 2000rpm or accelerating thoroughly in second, and in third the dying is gradually dying. I packed it into dirt in the injectors, since I had to stretch the reservation a day ago, but when it happens to me, I also notice that the car accelerates alone, and touching the accelerator already rises of turns. That is why I believe that more than the injectors can be a problem of the accelerator winding (to call it somehow). What do you think?