I would still pull the injectors and check spray pattern and opening pressure. Have seldom seen a Roosa DM pump seal failure as they are much heavier than DB or DC shaft/seal design. Also how many hours on engine, is blowby excessive? May want to do a compression test, if low it will not burn the fuel as it should. Had a JD 4010 once with a dead miss, high blowby. Owner didn't worry about the miss, but did get fuel in the oil bad. Was corrected only after an engine overhaul.
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