My RX7 is having oil pressure issues too. then something that Jeff20B said stuck out to me like a sore thumb==
Front bearing is probably worn into the copper caused by over tightening the alt belt and lack of adequate oil volume over a lifetime.
which reminded me. i tighten the hell out of my alt belt because it wasnt contacting my clutch fan pulley. i mean i put a pry bar and lifted it i tighten it so hard. i never knew it could hurt. -_- needless to say my clutch fan work for quite a while then stopped and i just said fudge it. but now it makes sense why i dont have oil pressure either. Mine is 20 psi at idle (normally 40 psi), full tilt is at 60 psi (normally 110-120 psi) * i have a few oil pressure mods being as im going to turbo my car*. NOW how do i got about replaces said worn out part from my overzealous engineering?