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Fuel Pressure

1991 FUEL PRESSURE SPECIFICATIONS (EEC-IV - CARS)

Engine KOER psi (kg/cm2 ) KOEO psi (kg/cm2 )
2.3L HSC EFI SEFI 45-60 (3.2-4.2) 50-60 (3.5-4.2)
3.0L SHO SEFI 28-33 (2.0-2.3) 30-45 (2.1-3.2)
3.8L SC SEFI 30-40 (2.1-2.8) 35-40 (2.5-2.8)
All Others 30-45 (2.1-3.2) 35-40 (2.5-2.8)
1991 FUEL PRESSURE SPECIFICATIONS (EEC-IV - TRUCKS)

Engine KOER psi (kg/cm2 ) KOEO psi (kg/cm2 )
4.9L EFI 45-60 (3.2-4.2) 50-60 (3.5-4.2)
All Others 30-45 (2.1-3.2) 35-45 (2.5-3.2)
1991 FUEL PRESSURE SPECIFICATIONS (DIESEL - TRUCKS)

Engine KOER psi (kg/cm2 ) KOEO psi (kg/cm2 )
7.3L 41-55 (2.9-3.9) NA
1991 FUEL PRESSURE SPECIFICATIONS (EEC - CARS)

Engine KOER psi (kg/cm2 ) KOEO psi (kg/cm2 )
1.3L 25-31 (1.8-2.2) 64-85 (4.5-6.0)
1.6L 28-31 (2.0-2.2) 64-85 (4.5-6.0)
1.8L (1) 64-85 (4.5-6.0)
2.2L 27-33 (1.9-2.3) 64-85 (4.5-6.0)
2.2L Turbo 27-33 (1.9-2.3) 64-85 (4.5-6.0)
(1) Fuel pressure should be 30-37 psi (2.1-2.6 kg/cm2 ) with engine running and vacuum hose connected to fuel pressure regulator. Fuel pressure should be 38-45 psi (2.7-3.2 kg/cm2 ) with engine running and vacuum hose disconnected to fuel pressure regulator.