So i posted a while back about my car stuttering and acting weird. Finally ckecked the fuel pressure and it would drop when increasing revs. So I put in a Walbro 255 and a Kirban AFPR, set my prsssure at idle at about 43 psi with the vaccum hose off....rev it up and pressure still drops.....whats going on? Bad injector somewhere? Put a new sock on the pump and new filter when I did everything.