IIRC when you test the pressure/flow 4-7 PSI at the schrader valve is specs. 3 PSI might not be "bad" . You have to remember the IDI has a mechanical pump and it doesn't have to pressurize the fuel system- the IP does that.
1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
2012 Copper Canyon 273 FWRET w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here
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.
Proud Canadian BOOB man too!!
Please PRIVATE MESSAGE only!! ...
Please DO NOT.....visitor message me...