[DMRK]

Well I ran it with a jumper in place of the relay and same problem, so it is not the relay. Put the meter on the pump terminals (not gnd) again and the meter was reading 13 volts steady untill the car ran poor enough it died. The fuel pressure had dropped below 50psi at this point. On the previous pump voltage test my meter leads might not have had a good connection or I have multiple problems, but the pump voltage is good now. I have been cleaning every contact I can, even taking them out of the connectors to do so. I also took apart the fuel pump relay and cleaned the contact inside as well as the spades on the outside.

Now what else could account for my fuel pressure gradually falling? I think I have something clogging the line some where between the tank and the fuel filter in the engine bay. The PO said he cleaned out the tank, I think I'll check his work. Is it possible/probable for the fuel accumulators to get full of crap and maybe slowly block off fuel? Also I read in the Haynes manual about the compatibility of accumulators to certain fuel distributors, could this cause my problem? I think that maybe someone replaced the distributor at some point which has the new PN and I have the old 2 accumulator set up. Well thats where it stands for now, thanks for everyones help so far.