On a 1991 Camaro RS 3.1 liter 6 cylinder can the fuel pressure regulator be replaced without replacing rail?
Yes, on a 1991 Camaro RS with the 3.1L V6, the fuel pressure regulator can generally be replaced without replacing the fuel rail. The fuel pressure regulator is usually a separate component that bolts onto the fuel rail, not integrated into it. You'll likely need to disconnect fuel lines and possibly some vacuum lines, but the regulator itself is replaceable independently.