I disconnected and returned the aftermarket fuel pressure regulator too. I'm confused about whether the pressure gauge ever gave me an accurate read, which could mean the OEM regulator was fine and the gauge lead me to think it was not. Because I could not test the replacement regulator, I don't conclusively know if it was defective. So there remain three possibilities to explain the symptoms: (1) bad regulator, (2) bad regulator and a secondary problem too, or (3) the regulator was fine but something else entirely was responsible for the symptoms. Frustrating how many variables and unknowns there still are. Oh well. Scrounge the rides I need!
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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