i have a 87 tune port injected 350 that is running way too rich. I believe my fuel pressure regulator is going out and I need to know what the fuel pressure should be reading. I just put a new o2 sensor in because it was fowelling spark plugs out in two days. I just put some more in and it seems to be doing better since I put the o2 sensor in but is still running too rich and a friend of mine told me his did the same thing and it was his fuel pressure regulator. Can someone help me out please?!!