Fuel Pressure

Item Specification

Key ON Engine Running (KOER) - 4.6L, 5.4L 193-310 kPa (28-45 psi)
Key ON Engine OFF (KOEO) - 4.6L, 5.4L 240-310 kPa (35-45 psi)
KOER - 6.8L 379-448 kPa (55-65 psi)(a)
KOEO - 6.8L 276-345 kPa(a) (40-50 psi)
KOEO - 6.0L diesel 0-352 kPa (0-51 psi)
KOER - 6.0L diesel 262-352 kPa (38-51 psi)

a Measured by the fuel rail pressure (FRP) PID using the vehicle communication module (VCM) and integrated diagnostic system (IDS) with appropriate hardware, or equivalent scan tool. Mechanical gauge fuel pressure readings may vary from scan tool readings.