06 Nissan 3.5L v6 Fuel Trim Problem

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  • January 26, 2025 at 8:12 pm #308452
    Pauli925
    Participant

      Short Term Fuel Trim Bank 1
      Is 4.7%

      Long Term Fuel Trim Bank 1
      Is 0%

      Short Term Fuel Trim Bank 2
      Is 25%

      Using a lot of fuel and Bank 2 is where the problem looks to be

      Any Direction & help is greatly appreciated

      Thanks
      Pauli

      January 30, 2025 at 7:40 pm #308582
      Choppy12
      Participant

        I would look in the direction of a vacuum leak, check to see if your fuel trims get better with rpm if they do most likely a vacuum leak.

        January 30, 2025 at 10:19 pm #308585
        Pauli925
        Participant

          Bank 2 will not change with rpms pegging
          No 02 Code for front sensor
          Thinking that front 02 sensor is bad
          Will change it out
          If no improvement will make a smoke can check again for vacuum leaking someplace on the Bank 2

          March 24, 2025 at 6:10 am #310161
          hindsight
          Participant

            What’s the long term fuel trim on bank 2?
            Can you alter the 25% if you add propane to the intake?

            November 16, 2025 at 10:09 am #316818
            Carlostratos
            Participant

              Any update? Problem fixed with o2 sensor?

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