I have a 90 chevy truck with a built 400 sbc 454 tbi and 350 injectors. I just build it and put it in and to feed the 400 I put a external fuel pressure regulator and a 255lph 100 psi fuel pump. I have it set at about 20 psi and it wont go above that with this fuel pump. With this fuel pump I had to change wiring plug to fuel pump, do you think I may have put wires back wards? The 400 wants more fuel need more pressure.
Sunday, June 24th, 2012 AT 9:19 PM