Renncredible
Newbie
I have a 1999 7.4 vortec with both banks throwing lean codes. Bank 1 is just slightly above 10% sometimes but bank 2 is consistently 25%. Vacuum tested good @18. New fuel pump, filter, regulator and injectors. Fuel system harness was replaced in ‘21 and I’m still getting less pressure than I’d like. 52 psi with key on and holds perfectly when turned off. 45 psi at idle and doesnt go up much when throttled up. What am I missing here?