Is this injector noise? Is it normal? It's a pretty fresh swap. 100% stock. Didn't replace anything except the pilot bearing. Doesn't seem to fade or go away. However, I didn't let it heat up or run for long because it sounded concerning. Didn't rev it either. Probably should've. Also, I did search, but I'm new to this so I'm not sure if this is the right place to ask.