I had my car dynoed and had the opposite problem, I was running about 34psi and my idling a/f ratio was like 16 and steady at a little over 14 from 3400rpm and up. I bumped mine to about 40psi and it idles and runs much smoother, but I wont get back on the dyno for another month or so to see for sure where I'm at.
Are you checking your fuel pressure at the schrader valve or at the FPR? I heard your supposed to check it at the FPR for best accuracy, but I check mine at the schrader.
Are you checking your fuel pressure with the vaccuum line off and your finger over the vaccuum fitting? I was told this was the best way to check and adjust your fuel pressure as it gives accurate readings on what the fpr is set at because the vaccuum can fluctuate.
Good luck, hope you get it worked out.
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