Guhl Reflash 2.0

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  • GL1800 (2012+): Guhl Reflash 2.0

    I just got off the phone with Don Guhl and he is getting ready to apply the latest reflash to my ECU. I had the Level 3.1 reflash done about 6 weeks ago and was still encountering a significant cold engine stumble in the 2,600-2,800 RPM range. He said they have modified the fuel mapping significantly to add more fuel in the lower rpm range. I should my ECU back by Friday, so am I anxious to see if this resolved the stumble once and for all.
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  • #2
    My ECM comes back tomorrow as well. I originally had the 2.0 flash and developed the 2000-2500 rpm, 1/4 warm flat spot as well.
    Hoping this "Level 4" flash fixes that.

    Dean

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    • #3
      I have been patiently waiting for this issue to get sorted out. Once stable I'm ready to pull the trigger on an ECU flash.
      2012 Gold Wing Ultra Blue Level III
      2009 Hayabusa - Texas Mile- 206.1 MPH | Loring- 1 mile 205.49 MPH, 1.5 mile 212.27 MPH (Stock Motor-ECU Editor Tuned by Me)

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      • 1096dad
        1096dad commented
        Editing a comment
        Me to. Patiently waiting for the reports from those who have the latest update.

    • #4
      I got the ECU back today and hope to do a test ride here in about an hour. Fingers crossed. However, the last time I had the reflash, the stumble left the building, but returned a couple of weeks later. Weird.
      GOLDWING AND F6B MAINTENANCE VIDEOS
      Save $1000 a year in labor by doing your own maintenance!

      Website | YouTube | 2001-2017 Videos | 2018+ Videos

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      • #5
        That is odd. It kind of makes you think there is something other that the ECU causing the stumble. Maybe a sensor out of range.

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        • #6
          I am very interested in your findings. Thanks Cruise
          '12 GL1800 Level 4 & '08 FLHX Darksider #1378

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          • #7
            Any Report yet Cruiseman??? Hope its fine

            John
            John - Richmond 2013 GL1800, Level 3

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            • #8
              Only a short preliminary ride. Too soon to tell. I think I want to test it for a week before I post any results. The last time I had the reflash, I shot of my mouth about how it got rid of the stumble, then within a week, the stumble returned. I want to take a more measured approach this time.
              GOLDWING AND F6B MAINTENANCE VIDEOS
              Save $1000 a year in labor by doing your own maintenance!

              Website | YouTube | 2001-2017 Videos | 2018+ Videos

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              • #9
                It's been a week... any news god or bad?
                2007 Crucible Orange Metallic
                2009 Kawasaki Red Concours 14
                AMA Life Member 0672853
                IBA Member 8846 Premier
                NRA Life Member

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                • #10
                  Watch for my report coming Friday!
                  GOLDWING AND F6B MAINTENANCE VIDEOS
                  Save $1000 a year in labor by doing your own maintenance!

                  Website | YouTube | 2001-2017 Videos | 2018+ Videos

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                  • #11
                    Gulp! That's at least 5 days away? :p
                    2007 Crucible Orange Metallic
                    2009 Kawasaki Red Concours 14
                    AMA Life Member 0672853
                    IBA Member 8846 Premier
                    NRA Life Member

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