The dealership is still struggling to fix my issue, so they asked me to video it. It may end up requiring a lake trip with a mechanic and a "diacom" system but I thought I'd try the videos first.
The first video is a good example of what brings the check engine light on. Ballast tanks half full, WOT, as it hits 5000-5500 RPM, the "service engine" starts flashing and the annoying beep starts. This is after surfing all day with zero problems (I think.) I can reset it by turning the battery off, do the exact same thing again and have the same issue. No codes are visible, but when the dealership hooks up to it, it shows a fuel pressure sensor code.
https://youtu.be/TveSCf3iLJkThe second video is something I just noticed, but which I suspect is related. At WOT the RPMs drop from 5500 to 4500, then climb back up repeatedly. I wonder if there is an issue with fuel getting to the issue. Previously it didn't seem to affect performance, it just turned an annoying light and beep on. But now it is affecting how the engine runs. This is all with new premium gas in it. 2015 T23 with a 409 at 7000 feet.
https://www.youtube.com/watch?v=5Dx6kTN ... e=youtu.beNow that I think about it, I see a fairly variable speed while surfing. For example, if I set it at 11.8 it might go from 10.9 to 12.0. I always attributed that to maxing out the engine's capabilities at that altitude, but I wonder if I've been having performance issues due to this for a while. That light never came on in the first 40 or 50 hours though, but has been consistently doing it for 110 now.
