Does anyone know what the fuel pump pressure should be for my 1994 Chevy 454 tbi .. I have gotten the run around every time I ask this question. . Also why do new pumps very so much with pressure. . The Delphi pump is rated from 8 to 12 psi, the mid grade pump from Napa is rated at something like 15 to 20 psi and the bosh I found is like 25 to 30 psi.. these are all stock application pumps...
What do the injectors fire at and what does the regulator dump at
OK I will answer my self. . Injectors need 18 psi at least so that means I should go with the bosh pump to have more than adequate pressure. .