I'm a little late for my noon update but Windows *insisted* that I perform an update. Also, here's a video of one of the hesitations from the GoPro I had under the hood with a flashlight. Boost on this run didn't appear to go above 0psi during this run, I think it was actually peaking at or near 0. Throttle was maybe 30-40%, it doesn't take much more than the regular acceleration/cruise to cause the issue.
Video:
https://www.youtube.com/watch?v=-M8tg6rv5t0
Note: I don't know why but YouTube is taking forever to cut the length of the video down. Eventually it will, but until then you can skip to around 2:40 and see the fuel pressure during the hesitation issue. (if the video is only about a minute long, that means the editing finally finished) Until then, I suppose you could watch all 9 minutes, there's a couple other times that the problem happens a little bit.
Quick bullet points of what I found:
- Idle pressure is around 34psi.
-Cruising pressure is high 30s to about 40psi.
-Hesitation occurs and fuel pressure fluctuates with it between low and mid 40s psi, maybe hit 50psi once but it's hard to tell.
-Fuel pressure drops to high 30's on engine shut off.
-15 minutes after shutdown, pressure still reads 38psi. 45 minutes after shutdown it is at 22psi
Other note:
-After a run I had a small leak on one of my return line fittings, I was somewhat surprised that when I unhooked the return line that only a small amount of fuel came out and also the pressure on the feed line remained the same and didn't fall. I guess that could be normal, but it's not something I was expecting to see.