fuel pressure regulator
 

ok on my 90 turbo i installed an aeromotive fuel pressure ragulator with -6 an fittings in a parallel setup. For the last two weeks ive had the regulator set at 40 psi. Today i lifted the hood while idleling and i noticed the pressure was at 35. I tried to raise it back up but the pressure would not go over that. I still have the stock fuel pump does that mean its taking a crap on me. Ive been meaning to get at least a 255 fuel pump but i just want to make sure thats the problem. Any advise would help thanks. Oh yeah stock injectors too.