Latest Update: I replaced the fuel pump and screen. I also replaced the filter again. Fuel pressure on the rail still reads around 38 psi at idle vs spec of 44 to 48. When I disconnect the vacuum hose on the pressure regulator the pressure goes up to 50 psi. The regulator is new. Is it possible I have a bad regulator OR is it possible that too much vacuum pressure is being applied to the regulator? Anyone have any thoughts on this? The CE light comes on durring hard acceleration although it happens less often than before. Thanks