The six o'clock photo is of a 1992 940 with Regina fuel, although I'm not certain it matters at least in the NA cars. I can't speak about the FT or 16V engines, but since this was a popular question at one time I tried looking for one on line that would screw on and present a 90 degree Schrader valve for output. You want to take fuel pressure readings hands-off.
Then again, since I don't own anything with that means of checking fuel pressure, I didn't need it except to post that it might help someone else. Figured someone with one of these cars would tell us what works and include a picture. Got to be a Volvo Special Tool :)
Let us all know. Maybe if it isn't straight down on your FT rail, you can get a true shot at it from the end. If so, post a picture.
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Art Benstein near Baltimore
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