Fuel Pressure: Specifications

Fuel Pressure

Engine running - 5.4L and 6.8L gasoline 193-310 kPa (28-45 psi)
Engine running - 6.4L diesel 28-48 kPa (4-7 psi)
Key ON Engine OFF (KOEO) - 5.4L and 6.8L gasoline 240-310 kPa (35-45 psi)
KOEO - 6.4L diesel 28-48 kPa (4-7 psi) (a)

a After 30 seconds the fuel pump will shut off and the fuel pressure will begin to bleed down to 0 kPa (0 psi).