I don't see how a lean mixture in one cylinder could affect the injector or PC much. Well if it wasn't firing at all and was still getting some fuel it might have a bit more carbon maybe? Swap that injector around and see if the sound follows it.
Give it a few WOT runs she will probably clear up.
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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200
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