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understanding fuel trim's

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  • understanding fuel trim's

    long fuel.jpg
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  • #2
    long fuel 2.jpg

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    • #3
      this is some thing that would help most new and experience people

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      • #4
        bump back to top

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        • #5
          read and understand

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          • #6
            Good read. Thanks for posting. I'm starting to get it....slowly.....lol.

            Am I correct to assume everything mentioned only applies once the engine temp reaches 160? Before that, there's no feedback and thus no learning or modifying trims?

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            • #7
              Learning doesn't start till 1200 RPM by default.

              Fuel trims can only happen if the O2 sensor is online..... Closed loop.
              In my neighborhood, if you open your hood to check your oil, and the vehicle still runs after you close it.......Then your labeled the Neighborhood Mechanic.
              https://forums.edelbrock.com/filedat...?photoid=42773

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              • #8
                no before you start the engine start the tablet turn key on don't start the engine connect then go to fuel modifier then advanced there you will see cold temp and where to add fuel or take it away. remember to turn self off make changes you want then turn self turn back on . use the ? at the top of tablet it has a ton of info and read e-tuner manual i read mine 5-6 times before i ever started my can . and i'm a 40 year master a s e technician.

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                • #9
                  understanding the definition of l.f.t and s.f.t and a.r.f is always good to remind your self why you want to make adjustments not just push a button .

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                  • #10
                    help yourself to tune

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                    • #11
                      What's an a.r.f. ?

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                      • #12
                        Originally posted by R573CAR View Post
                        What's an a.r.f. ?
                        air fuel ratio

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                        • #13
                          should be a sticky

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                          • #14
                            wow the car gods do hear your prayers

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                            • #15
                              Originally posted by fleet man View Post
                              wow the car gods do hear your prayers
                              After 550 posts, I figured, you deserved it...lol
                              Don't get too caught up in the numbers.
                              Just give the Engine what it wants &
                              Let the numbers be what they are.

                              Jim McFarland....

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