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  • December 26, 2019 at 3:55 am #895598
    paul yaworskipaul yaworski
    Participant

      Hi All,
      Just got me an old snap on mt2500.
      Seems to be a handy tool for the year cars I have. I would like to use the display section but don’t know how yet.
      My question is how to get the original fuel trim charts for my 99 grand cherokee.
      This is so I can compare future readings to original.
      thanks,
      Paul

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    • January 2, 2020 at 11:03 pm #895640
      college mancollege man
      Moderator

        There are know real fuel trim charts. What we like to see is 10% positive to 10% negative. The readings may spike to 25% either
        direction. But the more the 20-25% range is held there you will set a code.

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