Fuel pressure regulator
1990 gt, t5, trick flow heads, 30 lbs injectors. The car has run great since I bought it 6 months ago. Recently is has had an enginemmiss under load, and it feels like it is shutting off when you go to wide open throttle. I installed a new 255 LPH fuel pump when I bought it. Fuel pressure reads 36 at idle, 40 when the vacuum hose is unhooked. In second gear at 2000 rpm pressure is 32 psi, at 4000 rpm pressure drops to 25, and it takes a while to build pressure back up over 30 psi. Any suggestions, fuel pressure regulator, pump, vacuum leak?