The pressure is normally stated as 4-6 psi however there are absolute minimums......
Fuel: manual lift pump pressures.
Filter inlet min. ( lift pump to filter ) - 2.0 psi
Filter Outlet min. ( filter to injection pump ) - 1.0 psi
Most 6.9s-7.3s have at least 3 to 5 psi taken at the Schrader valve with core removed.
Volume is just as important, Specs are 1 pint in 30 seconds at 675rpms running or 1/3 pint after 10 seconds of cranking*** only, taken at the Schrader valve with the core removed.
*** FSS wire disconnected
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93
Toys: 2006 37' Triple E Embassy coach (powered by Cummins), 18' Sylvan Pro Fish with Mariner motors.
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