Catch22

Thanks for everyone’s input. It ended up being the gauge. 20+psi still reads at 13.

Thanks for the quick response. I haven't checked anything yet, but I hope it's just the gauge. It runs great though, no hesitation. I don't think it would if the pressure was actually that low.

I just got my new to me 1978 J. One problem that has come up is the fuel pressure. Idle taxi, high power, boost pump on, boost pump off, all conditions have the same fuel pressure. It's reading right at the bottom of the scale, just below green arc. It does not fluctuate at all. It just holds constant, until shutting down when it moves all the way down. Any suggestions?