I am working on an 05 LLY with 144k miles on it. It keeps going into limp mode with a p0087 code. I checked the balance rates with a scanner and injector 2, and 5 are out of spec. This truck just came from the dealership and they replaced these 2 injectors already and they are still high. The fuel filter has been changed twice since this started. Just looking for some advice on what to try. This truck is stock.