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I don't think I'll ever run an aftermarket AFPR again except on my carb'd stuff.
It was a stock fuel pressure regulator, granted it was the original one from 1994 with 208,000 miles on it. I think it started leaking a long time ago before fully rupturing though, as this issue has been tripping me and the original tuner up for quite some time. Well the issue of whacky fuel trims and extended cranking, not the filling up with fuel instantly.