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rough idle

  1. 4.7L/4.7L HO/4.7L Gen II Engines
    Fully rebuilt engine with ~400 miles so far, have P0172 bank 2 running rich code and P0300 random misfire. Truck runs a little rough and noticeable power loss. If batteries disconnected and reconnected, codes clear and truck runs GOOD. After some driving codes come back and it runs rich again...