Do you have any photos of where the vacuum line is supposed to be routed? More specifically the fuel pressure regulator vacuum line and the map sensor vacuum line. I have a feeling I may have a vacuum line in the wrong place on the intake manifold.
So I re-checked my vacuum line for the FPR and it turns out I had a T with another vacuum line for my evap canister release valve. I think the T connector was leaking because I took that out and ran just the FPR line to the manifold and my fuel pressure dropped to 30-31 psi at idle. When I remove the vacuum line it goes straight to 38-39 psi.
I changed my plugs to champion copper plugs. All of my previous plugs were fouled and almost completely black at the electrodes. I also replaced my O2 sensor and found it had some dark coloring to it on the side facing the manifold. I guess I have been running really rich for quite a while and just never realized it.
I did pass smog this time around so that was great. Here are the new numbers. CO2 14.5 / 14.6, O2 .4 / .2, HC 89 / 42, CO .27 / .18, NO 555 / 545