[boxwrench]

It's always good to see these threads end well.

FWIW, the fuel pressure gauge I have is an Innova 3640, it's on Amazon for around $30us. Comes with adapters for lots of things, but screws directly into the test port on this car with no issue.

AI sucks for cars. I've tried a few just for yucks, but they'll hallucinate when they don't know the answer, on anything from exterior care to torque specs. This forum is a pretty good supply of Actual Intelligence, and more importantly, experience.