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  1. M

    BF90D running issues, surging or stumbling at mid range

    Just talked to my old friend at Honda (car) dealership where I used to work, and he is the guy who actually knows how things work internally, not just a parts swapper... According to him on the 2 sensor engine the 1 wire is for the idiot light but the 2 wire sensor is used to monitor VTEC...
  2. M

    BF90D running issues, surging or stumbling at mid range

    Since we're talking about VTEC actuator hanging up, I might as well pull the valve cover to visually inspect it, and while I'm there check the valve clearances and do the compression test while I'm at it... I would love to figure out the way check the fuel pressure, but it seems I would have to...
  3. M

    BF90D running issues, surging or stumbling at mid range

    I don't think it's a VTEC issue, but it's definitely a VTEC motor from a Honda Fit (Jazz for non-us market) The hunting could be O2, especially since the wire splice that was made is very iffy, might be vibration that was causing it to have intermittent signal, but not bad enough to throw a...
  4. M

    BF90D running issues, surging or stumbling at mid range

    Ordered HealTech, supposedly it can go live data... Also I have a scanner that can do Honda bikes and that also supposedly can do outboards as well, so I ordered an adapter, hoping one of those two things will work. I'm away for work most of the week, every week so all I can do is contemplate...
  5. M

    BF90D running issues, surging or stumbling at mid range

    Most of what I learned was last night, I can't leave things half finished so I was up late researching and now I'm paying for it, exhausted... NMEA is basically a CAN BUS that is compatible with many new gadgets, I just bought a chartplotter specifically non-NMEA because it was half price of a...
  6. M

    BF90D running issues, surging or stumbling at mid range

    First of all, appreciate the replies, really miss old days when online forums were a place for exchange of information and ideas, unlike current social media that is mostly clickbait. Little more info as I'm starting to figure this out: Engine is 2017 BF90DK4 which is NMEA2000 compatible...
  7. M

    BF90D running issues, surging or stumbling at mid range

    New to me 2017 BF90DK4, starts and runs fine, runs great at WOT around 6,000 rpm, accelerates fine from idle or near idle and from above 4,000 rpm, no hesitation, however at around 2,000 rpm it starts surging, about 10 second intervals it drops about 300 rpm and slowly picks up, holds RPM for...
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