On my 05, when started cold, or hot, it has a miss for a few seconds then smooths out. Once it does smooth out, it still sometimes has a somewhat uneven idle. I would not call it a miss, and is sometimes felt more than other times. I know for sure I have an injector that is seeping a little as I had some diesel spill from removing the return lines, which was pooled at the base of the injectors and I got bubbles out of #3. I plan on pulling it and replacing the seals. I have also gone into SDS and looked at the smooth running screen, or whatever it is called. Is this similar to balance rates on a Duramax where if you have them go above a certain number they need to be replaced? See attached screen shot. #1 is way higher than the rest? Does this indicate the injector is bad? I should probably do a return rate test (I have the factory tester for this). If this is indicating an issue with any of the injectors, can the nozzles be replaced, or does the entire injector need to be replaced?

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